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CVE-2026-53278

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: arm_mpam: Check whether the config array is allocated before destroying it __destroy_component_cfg() is called to free the conf…

Published Jun 26, 2026CWE-476EPSS 0.14%

Overview

CVE-2026-53278 is a medium-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

arm_mpam: Check whether the config array is allocated before destroying it

__destroy_component_cfg() is called to free the configuration array.

It uses the embedded 'garbage' structure, which means the array has

to be allocated.

If __destroy_component_cfg() is called from mpam_disable() before the

configuration was ever allocated, then a NULL pointer is dereferenced.

Check for this case and return early if the configuration is not

allocated.

__destroy_component_cfg() also frees the mbwu_state as this is allocated

by __allocate_component_cfg(). As the mbwu_state is allocated after

comp->cfg is set, and is also under mpam_list_lock, only the first

pointer needs checking.

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/6ccbb613b42a1f1ba7bfd547a148f644a902a25cRefgit.kernel.org/stable/c/8eb6dc76eeae5302c0d885906a0e469ef9630a59

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53278?

CVE-2026-53278 is a medium-severity vulnerability. It was published on June 26, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53278?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53278?

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-2026-53278?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53278 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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