SB20260928262 - Use-after-free in Linux kernel cad_pid handling in the reboot subsystem
Published: September 28, 2026 Updated: September 30, 2026
Security Bulletin ID
SB20260928262
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-97938)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free race condition in cad_pid pointer handling when concurrently accessing the cad_pid sysctl from user and PID namespaces. A local user can trigger concurrent sysctl operations to cause a denial of service.
Remediation
Install update from vendor's website.