SB2026091306 - Out-of-bounds write in Linux kernel md dm-pcache driver
Published: September 13, 2026
Security Bulletin ID
SB2026091306
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-80960)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to perform an out-of-bounds write to kernel heap memory.
The vulnerability exists due to an out-of-bounds write in the dm-pcache cache device initialization code when loading a table with a cache device containing a forged seg_num value. A local privileged user can supply a cache device with a crafted superblock to perform an out-of-bounds write to kernel heap memory.
Remediation
Install update from vendor's website.