SB20260812408 - Deadlock in Linux kernel fs
Published: August 12, 2026
Security Bulletin ID
SB20260812408
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) Deadlock (CVE-ID: CVE-2026-68132)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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 deadlock in the emergency thaw worker in fs/super.c when thawing frozen block devices. A local user can trigger emergency thaw handling to cause a denial of service.
The issue can deadlock against itself while reacquiring s_umount and can block subsequent unmount, freeze, or thaw operations for the affected filesystem and block device.
Remediation
Install update from vendor's website.