inet: frags: publish queues before arming timer

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74662
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:39 UTC
Updated2026-08-27 13:18:36 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: inet: frags: publish queues before arming timer inet_frag_create() arms the fragment queue timer before inserting the queue into the fqdir rhashtable. If the namespace fragment timeout is zero or negative, the timer can run before the queue is published. The timer callback then marks the queue complete, tries to remove a node that is not in the hash table yet, and drops the anticipated hash reference. Creation can subsequently publish the completed queue without restoring that reference, leaving a stale hash node after the caller drops the remaining reference. Publish the queue first and arm the timer while holding the queue lock. This makes timer expiry wait until the queue is visible in the hash table, so inet_frag_kill() can remove the node and balance the hash reference.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.004420000 probability, percentile 0.367850000 (date 2026-08-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 f4e4dab62181b7fe7c011bed6fbef9fc3d48c769 git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 4ed0681dc2c1e0538b79d2fc56190ffcb369dacd git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 08a04d7bfb9c103432561aff8a62b6872e694a6a git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 d3ffb89b2944672cf7bdd8e9ee577d2043b4a956 git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0 git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 9f904dd3e455750e5d4ec9b2f134835811b85a2f git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 928128865e43b197e30688dc1bc991592c97edcf git Not specified
CNA Linux Linux affected 648700f76b03b7e8149d13cc2bdb3355035258a9 653d7ddf6cba867777a3d14c4f83ace008c5ad13 git Not specified
CNA Linux Linux affected 493107105843f299662b3b664a83804645564f12 git Not specified
CNA Linux Linux affected 4.4.174 4.5 semver Not specified
CNA Linux Linux affected 4.17 Not specified
CNA Linux Linux unaffected 4.17 semver Not specified
CNA Linux Linux unaffected 5.10.267 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.218 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.185 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.154 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.106 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d3ffb89b2944672cf7bdd8e9ee577d2043b4a956 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f4e4dab62181b7fe7c011bed6fbef9fc3d48c769 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4ed0681dc2c1e0538b79d2fc56190ffcb369dacd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f904dd3e455750e5d4ec9b2f134835811b85a2f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/928128865e43b197e30688dc1bc991592c97edcf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/653d7ddf6cba867777a3d14c4f83ace008c5ad13 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/08a04d7bfb9c103432561aff8a62b6872e694a6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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