Out-of-bounds read in Linux kernel - CVE-2026-80958
Published: September 13, 2026
Vulnerability identifier: #VU149438
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80958
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read data from the following control area.
The vulnerability exists due to an out-of-bounds read in the dm-pcache tail-kset read operations in cache_replay(), the writeback worker, and the GC worker when reading tail ksets near the end of a cache segment. A local user can trigger an affected tail-kset read to read data from the following control area.
Affected software
Linux kernel
How to mitigate CVE-2026-80958
Install security update from vendor's repository.