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CVE-2026-53296

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: free channels on probe error On probe error, free the previously obtained channels.

Published Jun 26, 2026CWE-416EPSS 0.18%

Overview

CVE-2026-53296 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: free channels on probe error

On probe error, free the previously obtained channels. This not only

prevents a leak, but also UAF scenarios because the client structure

will be removed nonetheless because it was allocated with devm.

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/02beb178e2e159daeb8f992d7abb16a37da31664Refgit.kernel.org/stable/c/0ad8c4a03a358de7811ba1ab8cbd1fe76ad0ff6bRefgit.kernel.org/stable/c/15c4cc3850cfe1b973eb7b63c02314b267f06a64Refgit.kernel.org/stable/c/187069ccc3474516af32350e20d7e449160fa6deRefgit.kernel.org/stable/c/6c6ce2ccb4fcf1617fec83f91b21aa0265f30701Refgit.kernel.org/stable/c/742001919653e7313b4e91780c5d108be1692365Refgit.kernel.org/stable/c/81c9e7e4030e71391ab479c4c6e17b64802577aaRefgit.kernel.org/stable/c/c02053a9055d5fdfd32432287cca8958db1d5bc5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53296?

CVE-2026-53296 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-2026-53296?

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-2026-53296?

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-2026-53296?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53296 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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