CVE-2026-80957
kernel: dm-pcache: detect a cycle in the last-kset chain during replay
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 dm-pcache component of the Linux kernel. A local attacker could exploit a vulnerability in the cache_replay() function, which does not properly handle a forged last-kset chain. By crafting a malicious chain that points back to an already visited segment, an attacker can cause an infinite loop during replay, leading to a Denial of Service (DoS) condition.
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-835 · Loop with Unreachable Exit Condition ('Infinite Loop')