Vulnerability-Lookup

alsa-2025:16880

Vulnerability from osv_almalinux

Published

2025-09-29 00:00

Modified

2025-10-01 09:18

Summary

Moderate: kernel security update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472)
kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527)
kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718)
kernel: tls: fix handling of zero-length records on the rx_list (CVE-2025-39682)
kernel: io_uring/futex: ensure io_futex_wait() cleans up properly on failure (CVE-2025-39698)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

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  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.  \n\nSecurity Fix(es):  \n\n  * kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472)\n  * kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527)\n  * kernel: sctp: linearize cloned gso packets in sctp_rcv (CVE-2025-38718)\n  * kernel: tls: fix handling of zero-length records on the rx_list (CVE-2025-39682)\n  * kernel: io_uring/futex: ensure io_futex_wait() cleans up properly on failure (CVE-2025-39698)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2025:16880",
  "modified": "2025-10-01T09:18:26Z",
  "published": "2025-09-29T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2025:16880"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38472"
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38527"
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      "url": "https://access.redhat.com/security/cve/CVE-2025-38718"
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      "url": "https://access.redhat.com/security/cve/CVE-2025-39682"
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      "url": "https://access.redhat.com/security/cve/CVE-2025-39698"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2383916"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2388928"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2393166"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2393511"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2393519"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2025-16880.html"
    }
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  "related": [
    "CVE-2025-38472",
    "CVE-2025-38527",
    "CVE-2025-38718",
    "CVE-2025-39682",
    "CVE-2025-39698"
  ],
  "summary": "Moderate: kernel security update"
}

CVE-2025-38472 (GCVE-0-2025-38472)

Vulnerability from cvelistv5 – Published: 2025-07-28 11:21 – Updated: 2025-11-03 17:38

Title

netfilter: nf_conntrack: fix crash due to removal of uninitialised entry

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry A crash in conntrack was reported while trying to unlink the conntrack entry from the hash bucket list: [exception RIP: __nf_ct_delete_from_lists+172] [..] #7 [ff539b5a2b043aa0] nf_ct_delete at ffffffffc124d421 [nf_conntrack] #8 [ff539b5a2b043ad0] nf_ct_gc_expired at ffffffffc124d999 [nf_conntrack] #9 [ff539b5a2b043ae0] __nf_conntrack_find_get at ffffffffc124efbc [nf_conntrack] [..] The nf_conn struct is marked as allocated from slab but appears to be in a partially initialised state: ct hlist pointer is garbage; looks like the ct hash value (hence crash). ct->status is equal to IPS_CONFIRMED|IPS_DYING, which is expected ct->timeout is 30000 (=30s), which is unexpected. Everything else looks like normal udp conntrack entry. If we ignore ct->status and pretend its 0, the entry matches those that are newly allocated but not yet inserted into the hash: - ct hlist pointers are overloaded and store/cache the raw tuple hash - ct->timeout matches the relative time expected for a new udp flow rather than the absolute 'jiffies' value. If it were not for the presence of IPS_CONFIRMED, __nf_conntrack_find_get() would have skipped the entry. Theory is that we did hit following race: cpu x cpu y cpu z found entry E found entry E E is expired <preemption> nf_ct_delete() return E to rcu slab init_conntrack E is re-inited, ct->status set to 0 reply tuplehash hnnode.pprev stores hash value. cpu y found E right before it was deleted on cpu x. E is now re-inited on cpu z. cpu y was preempted before checking for expiry and/or confirm bit. ->refcnt set to 1 E now owned by skb ->timeout set to 30000 If cpu y were to resume now, it would observe E as expired but would skip E due to missing CONFIRMED bit. nf_conntrack_confirm gets called sets: ct->status |= CONFIRMED This is wrong: E is not yet added to hashtable. cpu y resumes, it observes E as expired but CONFIRMED: <resumes> nf_ct_expired() -> yes (ct->timeout is 30s) confirmed bit set. cpu y will try to delete E from the hashtable: nf_ct_delete() -> set DYING bit __nf_ct_delete_from_lists Even this scenario doesn't guarantee a crash: cpu z still holds the table bucket lock(s) so y blocks: wait for spinlock held by z CONFIRMED is set but there is no guarantee ct will be added to hash: "chaintoolong" or "clash resolution" logic both skip the insert step. reply hnnode.pprev still stores the hash value. unlocks spinlock return NF_DROP <unblocks, then crashes on hlist_nulls_del_rcu pprev> In case CPU z does insert the entry into the hashtable, cpu y will unlink E again right away but no crash occurs. Without 'cpu y' race, 'garbage' hlist is of no consequence: ct refcnt remains at 1, eventually skb will be free'd and E gets destroyed via: nf_conntrack_put -> nf_conntrack_destroy -> nf_ct_destroy. To resolve this, move the IPS_CONFIRMED assignment after the table insertion but before the unlock. Pablo points out that the confirm-bit-store could be reordered to happen before hlist add resp. the timeout fixup, so switch to set_bit and before_atomic memory barrier to prevent this. It doesn't matter if other CPUs can observe a newly inserted entry right before the CONFIRMED bit was set: Such event cannot be distinguished from above "E is the old incarnation" case: the entry will be skipped. Also change nf_ct_should_gc() to first check the confirmed bit. The gc sequence is: 1. Check if entry has expired, if not skip to next entry 2. Obtain a reference to the expired entry. 3. Call nf_ct_should_gc() to double-check step 1. nf_ct_should_gc() is thus called only for entries that already failed an expiry check. After this patch, once the confirmed bit check pas ---truncated---

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a47ef874189d47f93…
	https://git.kernel.org/stable/c/76179961c423cd698…
	https://git.kernel.org/stable/c/fc38c249c622ff5e3…
	https://git.kernel.org/stable/c/938ce0e8422d3793f…
	https://git.kernel.org/stable/c/2d72afb340657f03f…

Impacted products

Vendor

Product

Version

Linux

Affected: 1397af5bfd7d32b0cf2adb70a78c9a9e8f11d912 , < a47ef874189d47f934d0809ae738886307c0ea22 (git)
Affected: 1397af5bfd7d32b0cf2adb70a78c9a9e8f11d912 , < 76179961c423cd698080b5e4d5583cf7f4fcdde9 (git)
Affected: 1397af5bfd7d32b0cf2adb70a78c9a9e8f11d912 , < fc38c249c622ff5e3011b8845fd49dbfd9289afc (git)
Affected: 1397af5bfd7d32b0cf2adb70a78c9a9e8f11d912 , < 938ce0e8422d3793fe30df2ed0e37f6bc0598379 (git)
Affected: 1397af5bfd7d32b0cf2adb70a78c9a9e8f11d912 , < 2d72afb340657f03f7261e9243b44457a9228ac7 (git)
Affected: 594cea2c09f7cd440d1ee1c4547d5bc6a646b0e4 (git)

Linux

Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 6.1.147 , ≤ 6.1.* (semver)
Unaffected: 6.6.100 , ≤ 6.6.* (semver)
Unaffected: 6.12.40 , ≤ 6.12.* (semver)
Unaffected: 6.15.8 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack: fix crash due to removal of uninitialised entry\n\nA crash in conntrack was reported while trying to unlink the conntrack\nentry from the hash bucket list:\n    [exception RIP: __nf_ct_delete_from_lists+172]\n    [..]\n #7 [ff539b5a2b043aa0] nf_ct_delete at ffffffffc124d421 [nf_conntrack]\n #8 [ff539b5a2b043ad0] nf_ct_gc_expired at ffffffffc124d999 [nf_conntrack]\n #9 [ff539b5a2b043ae0] __nf_conntrack_find_get at ffffffffc124efbc [nf_conntrack]\n    [..]\n\nThe nf_conn struct is marked as allocated from slab but appears to be in\na partially initialised state:\n\n ct hlist pointer is garbage; looks like the ct hash value\n (hence crash).\n ct-\u003estatus is equal to IPS_CONFIRMED|IPS_DYING, which is expected\n ct-\u003etimeout is 30000 (=30s), which is unexpected.\n\nEverything else looks like normal udp conntrack entry.  If we ignore\nct-\u003estatus and pretend its 0, the entry matches those that are newly\nallocated but not yet inserted into the hash:\n  - ct hlist pointers are overloaded and store/cache the raw tuple hash\n  - ct-\u003etimeout matches the relative time expected for a new udp flow\n    rather than the absolute \u0027jiffies\u0027 value.\n\nIf it were not for the presence of IPS_CONFIRMED,\n__nf_conntrack_find_get() would have skipped the entry.\n\nTheory is that we did hit following race:\n\ncpu x \t\t\tcpu y\t\t\tcpu z\n found entry E\t\tfound entry E\n E is expired\t\t\u003cpreemption\u003e\n nf_ct_delete()\n return E to rcu slab\n\t\t\t\t\tinit_conntrack\n\t\t\t\t\tE is re-inited,\n\t\t\t\t\tct-\u003estatus set to 0\n\t\t\t\t\treply tuplehash hnnode.pprev\n\t\t\t\t\tstores hash value.\n\ncpu y found E right before it was deleted on cpu x.\nE is now re-inited on cpu z.  cpu y was preempted before\nchecking for expiry and/or confirm bit.\n\n\t\t\t\t\t-\u003erefcnt set to 1\n\t\t\t\t\tE now owned by skb\n\t\t\t\t\t-\u003etimeout set to 30000\n\nIf cpu y were to resume now, it would observe E as\nexpired but would skip E due to missing CONFIRMED bit.\n\n\t\t\t\t\tnf_conntrack_confirm gets called\n\t\t\t\t\tsets: ct-\u003estatus |= CONFIRMED\n\t\t\t\t\tThis is wrong: E is not yet added\n\t\t\t\t\tto hashtable.\n\ncpu y resumes, it observes E as expired but CONFIRMED:\n\t\t\t\u003cresumes\u003e\n\t\t\tnf_ct_expired()\n\t\t\t -\u003e yes (ct-\u003etimeout is 30s)\n\t\t\tconfirmed bit set.\n\ncpu y will try to delete E from the hashtable:\n\t\t\tnf_ct_delete() -\u003e set DYING bit\n\t\t\t__nf_ct_delete_from_lists\n\nEven this scenario doesn\u0027t guarantee a crash:\ncpu z still holds the table bucket lock(s) so y blocks:\n\n\t\t\twait for spinlock held by z\n\n\t\t\t\t\tCONFIRMED is set but there is no\n\t\t\t\t\tguarantee ct will be added to hash:\n\t\t\t\t\t\"chaintoolong\" or \"clash resolution\"\n\t\t\t\t\tlogic both skip the insert step.\n\t\t\t\t\treply hnnode.pprev still stores the\n\t\t\t\t\thash value.\n\n\t\t\t\t\tunlocks spinlock\n\t\t\t\t\treturn NF_DROP\n\t\t\t\u003cunblocks, then\n\t\t\t crashes on hlist_nulls_del_rcu pprev\u003e\n\nIn case CPU z does insert the entry into the hashtable, cpu y will unlink\nE again right away but no crash occurs.\n\nWithout \u0027cpu y\u0027 race, \u0027garbage\u0027 hlist is of no consequence:\nct refcnt remains at 1, eventually skb will be free\u0027d and E gets\ndestroyed via: nf_conntrack_put -\u003e nf_conntrack_destroy -\u003e nf_ct_destroy.\n\nTo resolve this, move the IPS_CONFIRMED assignment after the table\ninsertion but before the unlock.\n\nPablo points out that the confirm-bit-store could be reordered to happen\nbefore hlist add resp. the timeout fixup, so switch to set_bit and\nbefore_atomic memory barrier to prevent this.\n\nIt doesn\u0027t matter if other CPUs can observe a newly inserted entry right\nbefore the CONFIRMED bit was set:\n\nSuch event cannot be distinguished from above \"E is the old incarnation\"\ncase: the entry will be skipped.\n\nAlso change nf_ct_should_gc() to first check the confirmed bit.\n\nThe gc sequence is:\n 1. Check if entry has expired, if not skip to next entry\n 2. Obtain a reference to the expired entry.\n 3. Call nf_ct_should_gc() to double-check step 1.\n\nnf_ct_should_gc() is thus called only for entries that already failed an\nexpiry check. After this patch, once the confirmed bit check pas\n---truncated---"
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    "datePublished": "2025-07-28T11:21:33.977Z",
    "dateReserved": "2025-04-16T04:51:24.021Z",
    "dateUpdated": "2025-11-03T17:38:37.206Z",
    "state": "PUBLISHED"
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}

CVE-2025-39682 (GCVE-0-2025-39682)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:20 – Updated: 2025-11-03 17:42

Title

tls: fix handling of zero-length records on the rx_list

Summary

In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them) - one non-DATA record If the next record has different type than what has already been processed we break out of the main processing loop. If the record has already been decrypted (which may be the case for TLS 1.3 where we don't know type until decryption) we queue the pending record to the rx_list. Next recvmsg() will pick it up from there. Queuing the skb to rx_list after zero-copy decrypt is not possible, since in that case we decrypted directly to the user space buffer, and we don't have an skb to queue (darg.skb points to the ciphertext skb for access to metadata like length). Only data records are allowed zero-copy, and we break the processing loop after each non-data record. So we should never zero-copy and then find out that the record type has changed. The corner case we missed is when the initial record comes from rx_list, and it's zero length.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2902c3ebcca52ca84…
	https://git.kernel.org/stable/c/c09dd3773b5950e9c…
	https://git.kernel.org/stable/c/3439c15ae91a517cf…
	https://git.kernel.org/stable/c/29c0ce3c8cdb6dc5d…
	https://git.kernel.org/stable/c/62708b9452f8eb775…

Impacted products

Vendor

Product

Version

Linux

Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 2902c3ebcca52ca845c03182000e8d71d3a5196f (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < c09dd3773b5950e9cfb6c9b9a5f6e36d06c62677 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 3439c15ae91a517cf3c650ea15a8987699416ad9 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 29c0ce3c8cdb6dc5d61139c937f34cb888a6f42e (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 62708b9452f8eb77513115b17c4f8d1a22ebf843 (git)

Linux

Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.149 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2025-38527 (GCVE-0-2025-38527)

Vulnerability from cvelistv5 – Published: 2025-08-16 11:12 – Updated: 2025-11-03 17:39

Title

smb: client: fix use-after-free in cifs_oplock_break

Summary

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free in cifs_oplock_break A race condition can occur in cifs_oplock_break() leading to a use-after-free of the cinode structure when unmounting: cifs_oplock_break() _cifsFileInfo_put(cfile) cifsFileInfo_put_final() cifs_sb_deactive() [last ref, start releasing sb] kill_sb() kill_anon_super() generic_shutdown_super() evict_inodes() dispose_list() evict() destroy_inode() call_rcu(&inode->i_rcu, i_callback) spin_lock(&cinode->open_file_lock) <- OK [later] i_callback() cifs_free_inode() kmem_cache_free(cinode) spin_unlock(&cinode->open_file_lock) <- UAF cifs_done_oplock_break(cinode) <- UAF The issue occurs when umount has already released its reference to the superblock. When _cifsFileInfo_put() calls cifs_sb_deactive(), this releases the last reference, triggering the immediate cleanup of all inodes under RCU. However, cifs_oplock_break() continues to access the cinode after this point, resulting in use-after-free. Fix this by holding an extra reference to the superblock during the entire oplock break operation. This ensures that the superblock and its inodes remain valid until the oplock break completes.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/4256a483fe58af66a…
	https://git.kernel.org/stable/c/0a4eec84d4d2c4085…
	https://git.kernel.org/stable/c/2baaf5bbab2ac474c…
	https://git.kernel.org/stable/c/09bce2138a30ef10d…
	https://git.kernel.org/stable/c/da11bd4b697b393a2…
	https://git.kernel.org/stable/c/705c79101ccf9edea…

Impacted products

Vendor

Product

Version

Linux

Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < 4256a483fe58af66a46cbf3dc48ff26e580d3308 (git)
Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < 0a4eec84d4d2c4085d4ed8630fd74e4b39033c1b (git)
Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < 2baaf5bbab2ac474c4f92c10fcb3310f824db995 (git)
Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < 09bce2138a30ef10d8821c8c3f73a4ab7a5726bc (git)
Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < da11bd4b697b393a207f19a2ed7d382a811a3ddc (git)
Affected: b98749cac4a695f084a5ff076f4510b23e353ecd , < 705c79101ccf9edea5a00d761491a03ced314210 (git)
Affected: 2429fcf06d3cb962693868ab0a927c9038f12a2d (git)
Affected: 1ee4f2d7cdcd4508cc3cbe3b2622d7177b89da12 (git)
Affected: 53fc31a4853e30d6e8f142b824f724da27ff3e40 (git)
Affected: 8092ecc306d81186a64cda42411121f4d35aaff4 (git)
Affected: ebac4d0adf68f8962bd82fcf483936edd6ec095b (git)

Linux

Affected: 5.1
Unaffected: 0 , < 5.1 (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.147 , ≤ 6.1.* (semver)
Unaffected: 6.6.100 , ≤ 6.6.* (semver)
Unaffected: 6.12.40 , ≤ 6.12.* (semver)
Unaffected: 6.15.8 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2025-39698 (GCVE-0-2025-39698)

Vulnerability from cvelistv5 – Published: 2025-09-05 17:21 – Updated: 2025-10-17 12:15

Title

io_uring/futex: ensure io_futex_wait() cleans up properly on failure

Summary

In the Linux kernel, the following vulnerability has been resolved: io_uring/futex: ensure io_futex_wait() cleans up properly on failure The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not. Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well. Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-672 - Operation on a Resource after Expiration or Release

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d9f93172820a53ab4…
	https://git.kernel.org/stable/c/d34c04152df517c59…
	https://git.kernel.org/stable/c/508c1314b342b7859…
	https://www.zerodayinitiative.com/advisories/ZDI-…

Impacted products

Vendor

Product

Version

Linux

Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < d9f93172820a53ab42c4b0e5e65291f4f9d00ad2 (git)
Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < d34c04152df517c59979b4bf2a47f491e06d3256 (git)
Affected: 194bb58c6090e39bd7d9b9c888a079213628e1f6 , < 508c1314b342b78591f51c4b5dadee31a88335df (git)

Linux

Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.12.44 , ≤ 6.12.* (semver)
Unaffected: 6.16.4 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2025-38718 (GCVE-0-2025-38718)

Vulnerability from cvelistv5 – Published: 2025-09-04 15:33 – Updated: 2026-02-06 16:31

Title

sctp: linearize cloned gso packets in sctp_rcv

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: linearize cloned gso packets in sctp_rcv A cloned head skb still shares these frag skbs in fraglist with the original head skb. It's not safe to access these frag skbs. syzbot reported two use-of-uninitialized-memory bugs caused by this: BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211 sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998 sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331 sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122 __release_sock+0x1da/0x330 net/core/sock.c:3106 release_sock+0x6b/0x250 net/core/sock.c:3660 sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360 sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885 sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031 inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:718 [inline] and BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987 sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88 sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331 sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148 __release_sock+0x1d3/0x330 net/core/sock.c:3213 release_sock+0x6b/0x270 net/core/sock.c:3767 sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367 sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886 sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032 inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:712 [inline] This patch fixes it by linearizing cloned gso packets in sctp_rcv().

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/d0194e391bb493aa6…
	https://git.kernel.org/stable/c/03d0cc6889e024201…
	https://git.kernel.org/stable/c/cd0e92bb2b7542fb9…
	https://git.kernel.org/stable/c/4506bcaabe004d07b…
	https://git.kernel.org/stable/c/ea094f38d387d1b0d…
	https://git.kernel.org/stable/c/7d757f17bc2ef2727…
	https://git.kernel.org/stable/c/fc66772607101bd20…
	https://git.kernel.org/stable/c/1bd5214ea681584c5…
	https://git.kernel.org/stable/c/fd60d8a086191fe33…

Impacted products

Vendor

Product

Version

Linux

Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < d0194e391bb493aa6cec56d177b14df6b29188d5 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 03d0cc6889e02420125510b5444b570f4bbf53d5 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < cd0e92bb2b7542fb96397ffac639b4f5b099d0cb (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 4506bcaabe004d07be8ff09116a3024fbd6aa965 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < ea094f38d387d1b0ded5dee4a3e5720aa4ce0139 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 7d757f17bc2ef2727994ffa6d5d6e4bc4789a770 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < fc66772607101bd2030a4332b3bd0ea3b3605250 (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < 1bd5214ea681584c5886fea3ba03e49f93a43c0e (git)
Affected: 90017accff61ae89283ad9a51f9ac46ca01633fb , < fd60d8a086191fe33c2d719732d2482052fa6805 (git)

Linux

Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.162 , ≤ 6.1.* (semver)
Unaffected: 6.6.103 , ≤ 6.6.* (semver)
Unaffected: 6.12.43 , ≤ 6.12.* (semver)
Unaffected: 6.15.11 , ≤ 6.15.* (semver)
Unaffected: 6.16.2 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "cd0e92bb2b7542fb96397ffac639b4f5b099d0cb",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "4506bcaabe004d07be8ff09116a3024fbd6aa965",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "ea094f38d387d1b0ded5dee4a3e5720aa4ce0139",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "7d757f17bc2ef2727994ffa6d5d6e4bc4789a770",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "fc66772607101bd2030a4332b3bd0ea3b3605250",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "1bd5214ea681584c5886fea3ba03e49f93a43c0e",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            },
            {
              "lessThan": "fd60d8a086191fe33c2d719732d2482052fa6805",
              "status": "affected",
              "version": "90017accff61ae89283ad9a51f9ac46ca01633fb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/input.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.162",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.43",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.297",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.190",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.162",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.103",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.43",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.11",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.2",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: linearize cloned gso packets in sctp_rcv\n\nA cloned head skb still shares these frag skbs in fraglist with the\noriginal head skb. It\u0027s not safe to access these frag skbs.\n\nsyzbot reported two use-of-uninitialized-memory bugs caused by this:\n\n  BUG: KMSAN: uninit-value in sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\n   sctp_inq_pop+0x15b7/0x1920 net/sctp/inqueue.c:211\n   sctp_assoc_bh_rcv+0x1a7/0xc50 net/sctp/associola.c:998\n   sctp_inq_push+0x2ef/0x380 net/sctp/inqueue.c:88\n   sctp_backlog_rcv+0x397/0xdb0 net/sctp/input.c:331\n   sk_backlog_rcv+0x13b/0x420 include/net/sock.h:1122\n   __release_sock+0x1da/0x330 net/core/sock.c:3106\n   release_sock+0x6b/0x250 net/core/sock.c:3660\n   sctp_wait_for_connect+0x487/0x820 net/sctp/socket.c:9360\n   sctp_sendmsg_to_asoc+0x1ec1/0x1f00 net/sctp/socket.c:1885\n   sctp_sendmsg+0x32b9/0x4a80 net/sctp/socket.c:2031\n   inet_sendmsg+0x25a/0x280 net/ipv4/af_inet.c:851\n   sock_sendmsg_nosec net/socket.c:718 [inline]\n\nand\n\n  BUG: KMSAN: uninit-value in sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\n   sctp_assoc_bh_rcv+0x34e/0xbc0 net/sctp/associola.c:987\n   sctp_inq_push+0x2a3/0x350 net/sctp/inqueue.c:88\n   sctp_backlog_rcv+0x3c7/0xda0 net/sctp/input.c:331\n   sk_backlog_rcv+0x142/0x420 include/net/sock.h:1148\n   __release_sock+0x1d3/0x330 net/core/sock.c:3213\n   release_sock+0x6b/0x270 net/core/sock.c:3767\n   sctp_wait_for_connect+0x458/0x820 net/sctp/socket.c:9367\n   sctp_sendmsg_to_asoc+0x223a/0x2260 net/sctp/socket.c:1886\n   sctp_sendmsg+0x3910/0x49f0 net/sctp/socket.c:2032\n   inet_sendmsg+0x269/0x2a0 net/ipv4/af_inet.c:851\n   sock_sendmsg_nosec net/socket.c:712 [inline]\n\nThis patch fixes it by linearizing cloned gso packets in sctp_rcv()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-06T16:31:22.089Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d0194e391bb493aa6cec56d177b14df6b29188d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/03d0cc6889e02420125510b5444b570f4bbf53d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/cd0e92bb2b7542fb96397ffac639b4f5b099d0cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/4506bcaabe004d07be8ff09116a3024fbd6aa965"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea094f38d387d1b0ded5dee4a3e5720aa4ce0139"
        },
        {
          "url": "https://git.kernel.org/stable/c/7d757f17bc2ef2727994ffa6d5d6e4bc4789a770"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc66772607101bd2030a4332b3bd0ea3b3605250"
        },
        {
          "url": "https://git.kernel.org/stable/c/1bd5214ea681584c5886fea3ba03e49f93a43c0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd60d8a086191fe33c2d719732d2482052fa6805"
        }
      ],
      "title": "sctp: linearize cloned gso packets in sctp_rcv",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38718",
    "datePublished": "2025-09-04T15:33:12.448Z",
    "dateReserved": "2025-04-16T04:51:24.033Z",
    "dateUpdated": "2026-02-06T16:31:22.089Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

alsa-2025:16880

Vulnerability from osv_almalinux

CVE-2025-38472 (GCVE-0-2025-38472)

CVE-2025-39682 (GCVE-0-2025-39682)

CVE-2025-38527 (GCVE-0-2025-38527)

CVE-2025-39698 (GCVE-0-2025-39698)

CVE-2025-38718 (GCVE-0-2025-38718)

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