Use-after-free in FreeBSD - CVE-2026-101308
Published: October 14, 2026
Vulnerability identifier: #VU155794
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101308
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to potentially escalate privileges.
The vulnerability exists due to use-after-free in the sound(4) driver when resizing an audio channel buffer concurrently with a memory-mapping operation. A local user can race an mmap(2) call against buffer resizing to potentially escalate privileges.
Exploitation requires access to a sound device.
Affected software
FreeBSD
How to mitigate CVE-2026-101308
Install security update from vendor's website.