Vulnerability-Lookup

alsa-2025:23241

Vulnerability from osv_almalinux

Published

2025-12-16 00:00

Modified

2026-01-05 20:29

Summary

Important: kernel security update

Details

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

Security Fix(es):

kernel: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499)
kernel: iommufd: Fix race during abort for file descriptors (CVE-2025-39966)
kernel: tls: wait for pending async decryptions if tls_strp_msg_hold fails (CVE-2025-40176)

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.

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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: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499)\n  * kernel: iommufd: Fix race during abort for file descriptors (CVE-2025-39966)\n  * kernel: tls: wait for pending async decryptions if tls_strp_msg_hold fails (CVE-2025-40176)\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-2025:23241",
  "modified": "2026-01-05T20:29:24Z",
  "published": "2025-12-16T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2025:23241"
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-38499"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-39966"
    },
    {
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      "url": "https://access.redhat.com/security/cve/CVE-2025-40176"
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      "url": "https://bugzilla.redhat.com/2387670"
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      "url": "https://bugzilla.redhat.com/2404107"
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      "url": "https://bugzilla.redhat.com/2414524"
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      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/9/ALSA-2025-23241.html"
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  "related": [
    "CVE-2025-38499",
    "CVE-2025-39966",
    "CVE-2025-40176"
  ],
  "summary": "Important: kernel security update"
}

CVE-2025-38499 (GCVE-0-2025-38499)

Vulnerability from cvelistv5 – Published: 2025-08-11 16:01 – Updated: 2025-11-03 17:39

Title

clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

Summary

In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/36fecd740de2d542d…
	https://git.kernel.org/stable/c/d717325b5ecf2a40d…
	https://git.kernel.org/stable/c/dc6a664089f10eab0…
	https://git.kernel.org/stable/c/e77078e52fbf018ab…
	https://git.kernel.org/stable/c/38628ae06e2a37770…
	https://git.kernel.org/stable/c/c28f922c9dcee0e48…

Impacted products

Vendor

Product

Version

Linux

Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < 36fecd740de2d542d2091d65d36554ee2bcf9c65 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < d717325b5ecf2a40daca85c61923e17f32306179 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < dc6a664089f10eab0fb36b6e4f705022210191d2 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < e77078e52fbf018ab986efb3c79065ab35025607 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < 38628ae06e2a37770cd794802a3f1310cf9846e3 (git)
Affected: 427215d85e8d1476da1a86b8d67aceb485eb3631 , < c28f922c9dcee0e4876a2c095939d77fe7e15116 (git)
Affected: c6e8810d25295acb40a7b69ed3962ff181919571 (git)
Affected: e3eee87c846dc47f6d8eb6d85e7271f24122a279 (git)
Affected: 517b875dfbf58f0c6c9e32dc90f5cf42d71a42ce (git)
Affected: 963d85d630dabe75a3cfde44a006fec3304d07b8 (git)
Affected: 812f39ed5b0b7f34868736de3055c92c7c4cf459 (git)
Affected: 6a002d48a66076524f67098132538bef17e8445e (git)
Affected: 41812f4b84484530057513478c6770590347dc30 (git)

Linux

Affected: 5.14
Unaffected: 0 , < 5.14 (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: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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CVE-2025-40176 (GCVE-0-2025-40176)

Vulnerability from cvelistv5 – Published: 2025-11-12 10:53 – Updated: 2025-12-01 06:19

Title

tls: wait for pending async decryptions if tls_strp_msg_hold fails

Summary

In the Linux kernel, the following vulnerability has been resolved: tls: wait for pending async decryptions if tls_strp_msg_hold fails Async decryption calls tls_strp_msg_hold to create a clone of the input skb to hold references to the memory it uses. If we fail to allocate that clone, proceeding with async decryption can lead to various issues (UAF on the skb, writing into userspace memory after the recv() call has returned). In this case, wait for all pending decryption requests.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/9f83fd0c179e0f458…
	https://git.kernel.org/stable/c/c61d4368197d65c48…
	https://git.kernel.org/stable/c/39dec4ea3daf77f68…
	https://git.kernel.org/stable/c/4fc109d0ab196bd94…
	https://git.kernel.org/stable/c/b8a6ff84abbcbbc44…

Impacted products

Vendor

Product

Version

Linux

Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 9f83fd0c179e0f458e824e417f9d5ad53443f685 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < c61d4368197d65c4809d9271f3b85325a600586a (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 39dec4ea3daf77f684308576baf483b55ca7f160 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < 4fc109d0ab196bd943b7451276690fb6bb48c2e0 (git)
Affected: 84c61fe1a75b4255df1e1e7c054c9e6d048da417 , < b8a6ff84abbcbbc445463de58704686011edc8e1 (git)

Linux

Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.158 , ≤ 6.1.* (semver)
Unaffected: 6.6.114 , ≤ 6.6.* (semver)
Unaffected: 6.12.55 , ≤ 6.12.* (semver)
Unaffected: 6.17.5 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/tls/tls_sw.c"
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              "status": "unaffected",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40176",
    "datePublished": "2025-11-12T10:53:50.443Z",
    "dateReserved": "2025-04-16T07:20:57.177Z",
    "dateUpdated": "2025-12-01T06:19:32.128Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-39966 (GCVE-0-2025-39966)

Vulnerability from cvelistv5 – Published: 2025-10-15 07:55 – Updated: 2025-10-15 07:55

Title

iommufd: Fix race during abort for file descriptors

Summary

In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix race during abort for file descriptors fput() doesn't actually call file_operations release() synchronously, it puts the file on a work queue and it will be released eventually. This is normally fine, except for iommufd the file and the iommufd_object are tied to gether. The file has the object as it's private_data and holds a users refcount, while the object is expected to remain alive as long as the file is. When the allocation of a new object aborts before installing the file it will fput() the file and then go on to immediately kfree() the obj. This causes a UAF once the workqueue completes the fput() and tries to decrement the users refcount. Fix this by putting the core code in charge of the file lifetime, and call __fput_sync() during abort to ensure that release() is called before kfree. __fput_sync() is a bit too tricky to open code in all the object implementations. Instead the objects tell the core code where the file pointer is and the core will take care of the life cycle. If the object is successfully allocated then the file will hold a users refcount and the iommufd_object cannot be destroyed. It is worth noting that close(); ioctl(IOMMU_DESTROY); doesn't have an issue because close() is already using a synchronous version of fput(). The UAF looks like this: BUG: KASAN: slab-use-after-free in iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376 Write of size 4 at addr ffff888059c97804 by task syz.0.46/6164 CPU: 0 UID: 0 PID: 6164 Comm: syz.0.46 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline] __refcount_dec include/linux/refcount.h:455 [inline] refcount_dec include/linux/refcount.h:476 [inline] iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376 __fput+0x402/0xb70 fs/file_table.c:468 task_work_run+0x14d/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x41c/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/17195a7d754a5c6a3…
	https://git.kernel.org/stable/c/e4825368285e33d63…
	https://git.kernel.org/stable/c/4e034bf045b12852a…

Impacted products

Vendor

Product

Version

Linux

Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < 17195a7d754a5c6a31888702ca93f6f08f3383ad (git)
Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < e4825368285e33d6360c6c6a6a10d2d83da06e55 (git)
Affected: 07838f7fd529c8a6de44b601d4b7057e6c8d36ed , < 4e034bf045b12852a24d5d33f2451850818ba0c1 (git)

Linux

Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.12.50 , ≤ 6.12.* (semver)
Unaffected: 6.16.10 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommufd/eventq.c",
            "drivers/iommu/iommufd/main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "17195a7d754a5c6a31888702ca93f6f08f3383ad",
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              "version": "07838f7fd529c8a6de44b601d4b7057e6c8d36ed",
              "versionType": "git"
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        },
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
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}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

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-2025:23241

Vulnerability from osv_almalinux

CVE-2025-38499 (GCVE-0-2025-38499)

CVE-2025-40176 (GCVE-0-2025-40176)

CVE-2025-39966 (GCVE-0-2025-39966)

Tags

Sightings

Nomenclature