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CVE-2026-64180

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mm/memory_hotplug: fix memory block reference leak on remove Patch series "mm: Fix memory block leaks and locking", v2.

Published Jul 19, 2026EPSS 0.11%

Overview

CVE-2026-64180 is a medium-severity vulnerability. It was published on July 19, 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/memory_hotplug: fix memory block reference leak on remove

Patch series "mm: Fix memory block leaks and locking", v2.

This series fixes two memory block device reference leaks and one locking

issue around the per-memory_block hwpoison counter.

This patch (of 2):

remove_memory_blocks_and_altmaps() looks up each memory block with

find_memory_block(), which acquires a reference to the memory block

device.

That reference is never dropped on this path, resulting in a leaked device

reference when removing memory blocks and their altmaps. Drop the

reference after retrieving mem->altmap and clearing mem->altmap, before

removing the memory block device.

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/09ce923071e7852ece60d7368e05249bf32c7967Refgit.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06bRefgit.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06Refgit.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64180?

CVE-2026-64180 is a medium-severity vulnerability. It was published on July 19, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-64180?

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-2026-64180?

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-2026-64180?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64180 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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