SB2026101492 - Privilege escalation in FreeBSD sound(4) driver
Published: October 14, 2026
Security Bulletin ID
SB2026101492
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-101308)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.