SB2026091303 - Infinite loop in Linux kernel md dm-pcache driver
Published: September 13, 2026
Security Bulletin ID
SB2026091303
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) Infinite loop (CVE-ID: CVE-2026-80957)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
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 an infinite loop in the dm-pcache cache_replay function when replaying a forged on-media last-kset chain. A local user can provide a chain that references a previously visited segment to cause a denial of service.
Remediation
Install update from vendor's website.