Vulnerability in Linux

CVE-2026-31682

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-31682: held from 0.005 to 0.008.

EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.004

Affected products

  • Linux — versions ed842faeb2bd49256f00485402f3113205f91d30, 4.15, 0
  • Linux Kernel — versions 7.0

References

Frequently asked questions

What is CVE-2026-31682?
CVE-2026-31682 is a critical-severity vulnerability in Linux. CVSS score: 9.1/10. Published 2026-04-25.
How severe is CVE-2026-31682?
Critical severity. CVSS v3 base score is 9.1 out of 10.