SB2026081650 - Use-after-free in Linux kernel ipv6

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Main Vulnerability Database SB2026081650

SB2026081650 - Use-after-free in Linux kernel ipv6

Published: August 16, 2026

Security Bulletin ID SB2026081650
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-72322)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a use-after-free in the IPv6 MLD delayed work handling in net/ipv6/mcast.c when processing incoming MLD queries during device teardown. A remote attacker can send crafted MLD query traffic to trigger a kernel panic and cause a denial of service.

The issue arises from a race condition between device destruction and packet receive processing under RCU protection.


Remediation

Install update from vendor's website.

References