CVEvulnerability

CVE-2026-101308

5.5 MEDIUM Published 2026-10-15 Modified 2026-10-19 Official page ↗
Status
Analyzed
Published
2026-10-15
Last modified
2026-10-19
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-367

Description

When an audio channel's buffer needs to be resized, the sound(4) driver checks that the buffer is not memory-mapped and then drops the channel lock to allocate a new buffer. An mmap(2) call on another thread can complete during this window, after which the resize path frees the now-mapped buffer without rechecking. An unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges.

Affected configurations

• freebsd freebsd 14.4 • freebsd freebsd 14.5 • freebsd freebsd 15.1

Related

Weakness · CWE (1)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness

References