CVE-2026-53295
kernel: mailbox: add sanity check for channel array
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 26, 2026
Updated · July 8, 2026
Description
A flaw was found in the Linux kernel's mailbox component. This vulnerability arises from an insufficient sanity check for the channel array. When a mailbox controller is initialized without an attached channel array, a subsequent operation can lead to a null pointer dereference, causing a kernel crash. This could result in a denial of service for the affected system.
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-166 · Improper Handling of Missing Special Element