What is CVE-2026-64180?

CVE-2026-64180 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.8 onward and patched in 6.12.92, 6.18.34, 7.0.11 and others. CVE-2026-64180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64180?

CVE-2026-64180 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-64180?

Yes, CVE-2026-64180 has been patched. Fixed versions include 6.12.92, 6.18.34, 7.0.11 and others. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64180 actively exploited?

CVE-2026-64180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64180

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. 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.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-08-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 6.8 and later are affected. Fixed in 6.12.92, 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.8

Fixed in

✓ 6.12.92 6.12.x ✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/09ce923071e7852ece60d7368e05249bf32c7967

Patch
Kernel Git
https://git.kernel.org/stable/c/93866f55f7e292fe3d47d36c9efe5ee10213a06b

Patch
Kernel Git
https://git.kernel.org/stable/c/b8ab30c79fc00147125b9c39f928561d9dd13d06

Patch
Kernel Git
https://git.kernel.org/stable/c/df64c0d21c3f85f844b2f656333e43d97e6ffa74

Patch

Details

CVE ID CVE-2026-64180

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-08-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64180?

CVE-2026-64180 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.8 onward and has been patched in 6.12.92, 6.18.34, 7.0.11 and others. CVE-2026-64180 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64180?

CVE-2026-64180 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-64180?

Yes. CVE-2026-64180 has been patched. Fixed versions include 6.12.92, 6.18.34, 7.0.11 and others. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64180 actively exploited?

No. CVE-2026-64180 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.