Critical 9.8Published Aug 22, 2026

CVE-2026-74662inet: frags: publish queues before arming timer

Updated under an hour ago (Oct 28, 2026, 6:00 PM ET)

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Exploited in the last 30 days

In 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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 648700f76b03b7e8149d13cc2bdb3355035258a9 before f4e4dab62181b7fe7c011bed6fbef9fc3d48c769; 648700f76b03b7e8149d13cc2bdb3355035258a9 builds before 4ed0681dc2c1e0538b79d2fc56190ffcb369dacd; 648700f76b03b7e8149d13cc2bdb3355035258a9 builds before 08a04d7bfb9c103432561aff8a62b6872e694a6a; from 648700f76b03b7e8149d13cc2bdb3355035258a9 before d3ffb89b2944672cf7bdd8e9ee577d2043b4a956; 648700f76b03b7e8149d13cc2bdb3355035258a9 builds before 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0; 648700f76b03b7e8149d13cc2bdb3355035258a9 builds before 9f904dd3e455750e5d4ec9b2f134835811b85a2f; from 648700f76b03b7e8149d13cc2bdb3355035258a9 before 928128865e43b197e30688dc1bc991592c97edcf; 648700f76b03b7e8149d13cc2bdb3355035258a9 builds before 653d7ddf6cba867777a3d14c4f83ace008c5ad13; and 2 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/f4e4dab62181b7fe7c011bed6fbef9fc3d48c769
https://git.kernel.org/stable/c/4ed0681dc2c1e0538b79d2fc56190ffcb369dacd
https://git.kernel.org/stable/c/08a04d7bfb9c103432561aff8a62b6872e694a6a
https://git.kernel.org/stable/c/d3ffb89b2944672cf7bdd8e9ee577d2043b4a956
https://git.kernel.org/stable/c/39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0
https://git.kernel.org/stable/c/9f904dd3e455750e5d4ec9b2f134835811b85a2f
https://git.kernel.org/stable/c/928128865e43b197e30688dc1bc991592c97edcf
https://git.kernel.org/stable/c/653d7ddf6cba867777a3d14c4f83ace008c5ad13

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.