CVE-2025-21867 (GCVE-0-2025-21867)

Vulnerability from cvelistv5 – Published: 2025-03-27 13:38 – Updated: 2025-11-03 19:38
VLAI?
Title
bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type() KMSAN reported a use-after-free issue in eth_skb_pkt_type()[1]. The cause of the issue was that eth_skb_pkt_type() accessed skb's data that didn't contain an Ethernet header. This occurs when bpf_prog_test_run_xdp() passes an invalid value as the user_data argument to bpf_test_init(). Fix this by returning an error when user_data is less than ETH_HLEN in bpf_test_init(). Additionally, remove the check for "if (user_size > size)" as it is unnecessary. [1] BUG: KMSAN: use-after-free in eth_skb_pkt_type include/linux/etherdevice.h:627 [inline] BUG: KMSAN: use-after-free in eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165 eth_skb_pkt_type include/linux/etherdevice.h:627 [inline] eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165 __xdp_build_skb_from_frame+0x5a8/0xa50 net/core/xdp.c:635 xdp_recv_frames net/bpf/test_run.c:272 [inline] xdp_test_run_batch net/bpf/test_run.c:361 [inline] bpf_test_run_xdp_live+0x2954/0x3330 net/bpf/test_run.c:390 bpf_prog_test_run_xdp+0x148e/0x1b10 net/bpf/test_run.c:1318 bpf_prog_test_run+0x5b7/0xa30 kernel/bpf/syscall.c:4371 __sys_bpf+0x6a6/0xe20 kernel/bpf/syscall.c:5777 __do_sys_bpf kernel/bpf/syscall.c:5866 [inline] __se_sys_bpf kernel/bpf/syscall.c:5864 [inline] __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:5864 x64_sys_call+0x2ea0/0x3d90 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd9/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: free_pages_prepare mm/page_alloc.c:1056 [inline] free_unref_page+0x156/0x1320 mm/page_alloc.c:2657 __free_pages+0xa3/0x1b0 mm/page_alloc.c:4838 bpf_ringbuf_free kernel/bpf/ringbuf.c:226 [inline] ringbuf_map_free+0xff/0x1e0 kernel/bpf/ringbuf.c:235 bpf_map_free kernel/bpf/syscall.c:838 [inline] bpf_map_free_deferred+0x17c/0x310 kernel/bpf/syscall.c:862 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa2b/0x1b60 kernel/workqueue.c:3310 worker_thread+0xedf/0x1550 kernel/workqueue.c:3391 kthread+0x535/0x6b0 kernel/kthread.c:389 ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 CPU: 1 UID: 0 PID: 17276 Comm: syz.1.16450 Not tainted 6.12.0-05490-g9bb88c659673 #8 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < f615fccfc689cb48977d275ac2e391297b52392b (git)
Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < d56d8a23d95100b65f40438639dd82db2af81c11 (git)
Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 972bafed67ca73ad9a56448384281eb5fd5c0ba3 (git)
Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 1a9e1284e87d59b1303b69d1808d310821d6e5f7 (git)
Affected: be3d72a2896cb24090f268dce4aa8a304d40bc23 , < 6b3d638ca897e099fa99bd6d02189d3176f80a47 (git)
Create a notification for this product.
    Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.130 , ≤ 6.1.* (semver)
Unaffected: 6.6.80 , ≤ 6.6.* (semver)
Unaffected: 6.12.17 , ≤ 6.12.* (semver)
Unaffected: 6.13.5 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T19:38:24.764Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21867\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-03-28T17:27:05.715395Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-03-28T17:27:07.063Z\"}}], \"cna\": {\"title\": \"bpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"be3d72a2896cb24090f268dce4aa8a304d40bc23\", \"lessThan\": \"f615fccfc689cb48977d275ac2e391297b52392b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be3d72a2896cb24090f268dce4aa8a304d40bc23\", \"lessThan\": \"d56d8a23d95100b65f40438639dd82db2af81c11\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be3d72a2896cb24090f268dce4aa8a304d40bc23\", \"lessThan\": \"972bafed67ca73ad9a56448384281eb5fd5c0ba3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be3d72a2896cb24090f268dce4aa8a304d40bc23\", \"lessThan\": \"1a9e1284e87d59b1303b69d1808d310821d6e5f7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"be3d72a2896cb24090f268dce4aa8a304d40bc23\", \"lessThan\": \"6b3d638ca897e099fa99bd6d02189d3176f80a47\", \"versionType\": \"git\"}], \"programFiles\": [\"net/bpf/test_run.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.130\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.80\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.17\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bpf/test_run.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f615fccfc689cb48977d275ac2e391297b52392b\"}, {\"url\": \"https://git.kernel.org/stable/c/d56d8a23d95100b65f40438639dd82db2af81c11\"}, {\"url\": \"https://git.kernel.org/stable/c/972bafed67ca73ad9a56448384281eb5fd5c0ba3\"}, {\"url\": \"https://git.kernel.org/stable/c/1a9e1284e87d59b1303b69d1808d310821d6e5f7\"}, {\"url\": \"https://git.kernel.org/stable/c/6b3d638ca897e099fa99bd6d02189d3176f80a47\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, test_run: Fix use-after-free issue in eth_skb_pkt_type()\\n\\nKMSAN reported a use-after-free issue in eth_skb_pkt_type()[1]. The\\ncause of the issue was that eth_skb_pkt_type() accessed skb\u0027s data\\nthat didn\u0027t contain an Ethernet header. This occurs when\\nbpf_prog_test_run_xdp() passes an invalid value as the user_data\\nargument to bpf_test_init().\\n\\nFix this by returning an error when user_data is less than ETH_HLEN in\\nbpf_test_init(). Additionally, remove the check for \\\"if (user_size \u003e\\nsize)\\\" as it is unnecessary.\\n\\n[1]\\nBUG: KMSAN: use-after-free in eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]\\nBUG: KMSAN: use-after-free in eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165\\n eth_skb_pkt_type include/linux/etherdevice.h:627 [inline]\\n eth_type_trans+0x4ee/0x980 net/ethernet/eth.c:165\\n __xdp_build_skb_from_frame+0x5a8/0xa50 net/core/xdp.c:635\\n xdp_recv_frames net/bpf/test_run.c:272 [inline]\\n xdp_test_run_batch net/bpf/test_run.c:361 [inline]\\n bpf_test_run_xdp_live+0x2954/0x3330 net/bpf/test_run.c:390\\n bpf_prog_test_run_xdp+0x148e/0x1b10 net/bpf/test_run.c:1318\\n bpf_prog_test_run+0x5b7/0xa30 kernel/bpf/syscall.c:4371\\n __sys_bpf+0x6a6/0xe20 kernel/bpf/syscall.c:5777\\n __do_sys_bpf kernel/bpf/syscall.c:5866 [inline]\\n __se_sys_bpf kernel/bpf/syscall.c:5864 [inline]\\n __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:5864\\n x64_sys_call+0x2ea0/0x3d90 arch/x86/include/generated/asm/syscalls_64.h:322\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xd9/0x1d0 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nUninit was created at:\\n free_pages_prepare mm/page_alloc.c:1056 [inline]\\n free_unref_page+0x156/0x1320 mm/page_alloc.c:2657\\n __free_pages+0xa3/0x1b0 mm/page_alloc.c:4838\\n bpf_ringbuf_free kernel/bpf/ringbuf.c:226 [inline]\\n ringbuf_map_free+0xff/0x1e0 kernel/bpf/ringbuf.c:235\\n bpf_map_free kernel/bpf/syscall.c:838 [inline]\\n bpf_map_free_deferred+0x17c/0x310 kernel/bpf/syscall.c:862\\n process_one_work kernel/workqueue.c:3229 [inline]\\n process_scheduled_works+0xa2b/0x1b60 kernel/workqueue.c:3310\\n worker_thread+0xedf/0x1550 kernel/workqueue.c:3391\\n kthread+0x535/0x6b0 kernel/kthread.c:389\\n ret_from_fork+0x6e/0x90 arch/x86/kernel/process.c:147\\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\\n\\nCPU: 1 UID: 0 PID: 17276 Comm: syz.1.16450 Not tainted 6.12.0-05490-g9bb88c659673 #8\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-3.fc41 04/01/2014\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.130\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.80\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.17\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.5\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"5.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:22:50.800Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21867\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T19:38:24.764Z\", \"dateReserved\": \"2024-12-29T08:45:45.781Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-03-27T13:38:20.673Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.