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CVE-2024-26993

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fs: sysfs: Fix reference leak in sysfs_break_active_protection() The sysfs_break_active_protection() routine has an obvious ref…

Published May 1, 2024EPSS 0.27%

Overview

CVE-2024-26993 is a medium-severity vulnerability. It was published on May 1, 2024 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:

fs: sysfs: Fix reference leak in sysfs_break_active_protection()

The sysfs_break_active_protection() routine has an obvious reference

leak in its error path. If the call to kernfs_find_and_get() fails then

kn will be NULL, so the companion sysfs_unbreak_active_protection()

routine won't get called (and would only cause an access violation by

trying to dereference kn->parent if it was called). As a result, the

reference to kobj acquired at the start of the function will never be

released.

Fix the leak by adding an explicit kobject_put() call when kn is NULL.

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/43f00210cb257bcb0387e8caeb4b46375d67f30cRefgit.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063Refgit.kernel.org/stable/c/5d43e072285e81b0b63cee7189b3357c7768a43bRefgit.kernel.org/stable/c/84bd4c2ae9c3d0a7d3a5c032ea7efff17af17e17Refgit.kernel.org/stable/c/a4c99b57d43bab45225ba92d574a8683f9edc8e4Refgit.kernel.org/stable/c/a90bca2228c0646fc29a72689d308e5fe03e6d78Refgit.kernel.org/stable/c/ac107356aabc362aaeb77463e814fc067a5d3957Refgit.kernel.org/stable/c/f28bba37fe244889b81bb5c508d3f6e5c6e342c5Refgit.kernel.org/stable/c/43f00210cb257bcb0387e8caeb4b46375d67f30cRefgit.kernel.org/stable/c/57baab0f376bec8f54b0fe6beb8f77a57c228063

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26993?

CVE-2024-26993 is a medium-severity vulnerability. It was published on May 1, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26993?

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-2024-26993?

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-2024-26993?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26993 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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