CVE intelligence

CVE-2026-31682

Vulnerability intelligence

Published Apr 25, 2026Sources checked Nov 12, 2026

9.1CRITICALCVSS out of 10

What this means

Review the available evidence

CVE-2026-31682 and is rated Critical severity with a CVSS score of 9.1. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Apr 29, 2026

CBL-Mariner Releases

Vendor-listed releases

6.6.134.1-2

CISA KEVNot listedBased on the latest collected catalog

EPSS0.6%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is 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.

Source: NVD