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CVE-2025-68761

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: hfs: fix potential use after free in hfs_correct_next_unused_CNID() This code calls hfs_bnode_put(node) which drops the refcoun…

Published Jan 5, 2026EPSS 0.13%

Overview

CVE-2025-68761 is a high-severity vulnerability. It was published on January 5, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

hfs: fix potential use after free in hfs_correct_next_unused_CNID()

This code calls hfs_bnode_put(node) which drops the refcount and then

dreferences "node" on the next line. It's only safe to use "node"

when we're holding a reference so flip these two lines around.

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/40a1e0142096dd7dd6cb5373841222b528698588Refgit.kernel.org/stable/c/c105e76bb17cf4b55fe89c6ad4f6a0e3972b5b08

How CyberStrike helps

Frequently asked questions

What is CVE-2025-68761?

CVE-2025-68761 is a high-severity vulnerability. It was published on January 5, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-68761?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-68761?

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-2025-68761?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-68761 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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