CVE-2026-53295: mailbox: add sanity check for channel array
In the Linux kernel, the following vulnerability has been resolved:
mailbox: add sanity check for channel array
Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers might instantiate very early. Remove the comment explaining the obvious while here.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.143.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53295?
CVE-2026-53295 has a medium severity rating of 5.5 according to the CVSS 3.1 scoring system.
How do I fix CVE-2026-53295?
To fix CVE-2026-53295, ensure that your system is updated to the latest Linux kernel version that addresses this vulnerability.
What impact does CVE-2026-53295 have on my system?
CVE-2026-53295 can lead to a system crash due to OOPS errors if there is no channel array attached to the mailbox controller.
Is CVE-2026-53295 exploitable remotely?
CVE-2026-53295 is not directly exploitable remotely as it requires local access to the affected mailbox controller.
Which systems are affected by CVE-2026-53295?
CVE-2026-53295 affects systems running vulnerable versions of the Linux kernel and Microsoft azl3 kernel.