CVE-2026-74662 (CVSS 9.8)

Description

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.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0051

Probability of exploitation

0.43%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

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

Frequently Asked Questions

What is CVE-2026-74662? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-74662? +

CVE-2026-74662 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0051, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-74662? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-74662