CVE-2026-80959
kernel: dm-pcache: bound the persisted tail-position offset
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · September 29, 2026
Description
A flaw was found in the Linux kernel's device-mapper persistent cache (dm-pcache) component. A local attacker with administrative privileges (CAP_SYS_ADMIN) could provide a specially crafted cache device, leading to an out-of-bounds read. This vulnerability allows reading past the intended segment data, which may result in information disclosure or system instability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read