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CVE-2026-52905

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm/damon/core: disallow non-power of two min_region_sz on damon_start() Commit d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_r…

Published Jun 9, 2026CWE-1284EPSS 0.16%

Overview

CVE-2026-52905 is a medium-severity vulnerability. It was published on June 9, 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:

mm/damon/core: disallow non-power of two min_region_sz on damon_start()

Commit d8f867fa0825 ("mm/damon: add damon_ctx->min_sz_region") introduced

a bug that allows unaligned DAMON region address ranges. Commit

c80f46ac228b ("mm/damon/core: disallow non-power of two min_region_sz")

fixed it, but only for damon_commit_ctx() use case. Still, DAMON sysfs

interface can emit non-power of two min_region_sz via damon_start(). Fix

the path by adding the is_power_of_2() check on damon_start().

The issue was discovered by sashiko [1].

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/1de2db19a6028abe7d905875922faef5b873de67Refgit.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75Refgit.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-52905?

CVE-2026-52905 is a medium-severity vulnerability. It was published on June 9, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-52905?

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-2026-52905?

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-2026-52905?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-52905 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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