CRITICAL: CVE-2026-31414 (CVSS 9.8) — multiple products

CVE: CVE-2026-31414

CVSS: 9.8 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

_See vendor advisory_

Summary

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_conntrack_expect: use expect->helper

Use expect->helper in ctnetlink and /proc to dump the helper name.

Using nfct_help() without holding a reference to the master conntrack

is unsafe.

Use exp->master->helper in ctnetlink path if userspace does not provide

an explicit helper when creating an expectation to retain the existing

behaviour. The ctnetlink expectation path holds the reference on the

master conntrack and nf_conntrack_expect lock and the nfnetlink glue

path refers to the master ct that is attached to the skb.

Verified Sources

References

https://git.kernel.org/stable/c/3dfd3f7712b5a800f2ba632179e9b738076a51f0
https://git.kernel.org/stable/c/4bd1b3d839172724b33d8d02c5a4ff6a1c775417
https://git.kernel.org/stable/c/847cb7fe26c5ce5dce0d1a41fac1ea488b7f1781
https://git.kernel.org/stable/c/b53294bff19e56ada2f230ceb8b1ffde61cc3817
https://git.kernel.org/stable/c/e7ccaa0a62a8ff2be5d521299ce79390c318d306
https://git.kernel.org/stable/c/f01794106042ee27e54af6fdf5b319a2fe3df94d

_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._

Lyrie Verdict

A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.

#critical