CVEvulnerability

CVE-2026-49412

7.8 HIGH Published 2026-06-27 Modified 2026-07-01 Official page ↗
Status
Analyzed
Published
2026-06-27
Last modified
2026-07-01
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

Description

The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges.

Affected configurations

• freebsd freebsd 14.3 • freebsd freebsd 14.4 • freebsd freebsd 15.0

Related

Weakness · CWE (1)

References