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CVE-2026-53294

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO.

Published Jun 26, 2026CWE-415EPSS 0.18%

Overview

CVE-2026-53294 is a high-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

mailbox: mailbox-test: don't free the reused channel

The RX channel can be aliased to the TX channel if it has a different

MMIO. This special case needs to be handled when freeing the channels

otherwise a double-free occurs.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4Refgit.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0Refgit.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060Refgit.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5Refgit.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324dRefgit.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473Refgit.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6Refgit.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53294?

CVE-2026-53294 is a high-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53294?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53294?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53294?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53294 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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