CRITICAL: CVE-2026-31682 (CVSS 9.1) — multiple products

CVE: CVE-2026-31682

CVSS: 9.1 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Severity: CRITICAL

Status: Critical advisory

Affected

_See vendor advisory_

Summary

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

bridge: br_nd_send: linearize skb before parsing ND options

br_nd_send() parses neighbour discovery options from ns->opt[] and

assumes that these options are in the linear part of request.

Its callers only guarantee that the ICMPv6 header and target address

are available, so the option area can still be non-linear. Parsing

ns->opt[] in that case can access data past the linear buffer.

Linearize request before option parsing and derive ns from the linear

network header.

Verified Sources

References

https://git.kernel.org/stable/c/2ba4caba423ed94d63006eb1d2227b0332ab7fcd
https://git.kernel.org/stable/c/3a30f6469b058574f49efde61cd6f5d79e576053
https://git.kernel.org/stable/c/4f397b950c916e9a1f8a4fce04ea0110206cad47
https://git.kernel.org/stable/c/658261898130da620fc3d0fbb0523efb3366cb55
https://git.kernel.org/stable/c/9c55e41c73af5c4511070933b1bd25248521270c
https://git.kernel.org/stable/c/a01aee7cafc575bb82f5529e8734e7052f9b16ea
https://git.kernel.org/stable/c/bd91ec85aa4c77d645bd2739fc56784157a88ca2
https://git.kernel.org/stable/c/c68433fd291c9e88c00292095172c62d1997d662

_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