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CVE-2026-64185

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: sysfs: don't remove existing directory on update failure When sysfs_update_group() is called for a named group and create_files…

Published Jul 19, 2026EPSS 0.12%

Overview

CVE-2026-64185 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:

sysfs: don't remove existing directory on update failure

When sysfs_update_group() is called for a named group and create_files()

fails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on

the group directory. In the update path, kn was obtained via

kernfs_find_and_get() and refers to a directory that already existed

before this call. Removing it silently destroys a sysfs group that the

caller did not create.

Only remove the directory if we created it ourselves. On update failure

the directory remains as it is left empty by remove_files() inside

create_files(), but can be repopulated by a retry.

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/14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8aRefgit.kernel.org/stable/c/237557b8a81ab948e8332f7c0058e758f081c0a3Refgit.kernel.org/stable/c/31527d80234caf83dc96ad478645e57df9de4472Refgit.kernel.org/stable/c/48fa96538bd2868034d33429e4565fda384d0736Refgit.kernel.org/stable/c/57b285e0368290aa55f79ba11419b96d0ebdb418Refgit.kernel.org/stable/c/708f6926f61f71e09b5e9fd668b9882ccd46e69fRefgit.kernel.org/stable/c/c5e125c828b701afaf7493b42a14aa89362ff36dRefgit.kernel.org/stable/c/ccadd32cc1263802a5969c9efe0e96225450428c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64185?

CVE-2026-64185 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-2026-64185?

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-2026-64185?

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-2026-64185?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64185 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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