inet: frags: publish queues before arming timer

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Summary

CVECVE-2026-74662
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:39 UTC
Updated2026-08-22 16:16:39 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
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 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/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
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