CVE-2026-98867
kernel: dm-pcache: bound the logical key offset from persistent memory
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 24, 2026
Description
A flaw was found in the Linux kernel's Device Mapper persistent cache (dm-pcache) module. A local attacker capable of mounting or attaching a crafted persistent cache device can exploit missing boundary checks on logical key offsets. This flaw triggers an out-of-bounds memory write during cache replay, leading to a system crash, resulting in a Denial of Service (DoS) or potential memory corruption.
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 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-787 · Out-of-bounds Write