CVE-2026-53064
kernel: dm cache: fix null-deref with concurrent writes in passthrough mode
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 24, 2026
Updated · July 22, 2026
Description
A flaw was found in the Linux kernel's device-mapper (dm-cache) component. When dm-cache operates in passthrough mode, a race condition can occur during concurrent write operations to the same cached block. This can lead to a null-pointer dereference in the invalidate_complete() function, potentially causing a system crash or Denial of Service (DoS).
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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition