CVE-2026-53295
Received Received - Intake
Mailbox Controller Channel Array Sanity Check Failure

Publication date: 2026-06-26

Last updated on: 2026-06-26

Assigner: kernel.org

Description
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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-06-26
Last Modified
2026-06-26
Generated
2026-06-27
AI Q&A
2026-06-26
EPSS Evaluated
N/A
NVD
CVE-2026-53295
EUVD
EUVD-2026-39900
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

This vulnerability exists in the Linux kernel's mailbox subsystem. It occurs when there is no channel array attached to the mailbox controller, and the system attempts to dereference this non-existent array. This leads to an OOPS, which is a kernel error that can cause the system to crash or behave unexpectedly. The fix involves adding a sanity check to ensure the channel array exists before it is accessed, allowing the system to fail gracefully instead of crashing.

Impact Analysis

If this vulnerability is triggered, it can cause the Linux kernel to experience an OOPS, which is a serious error that may lead to system instability or crashes. Since mailbox controllers might initialize very early during system startup, this issue might not be immediately visible but can affect system reliability and availability.

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-53295. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart