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CVE-2026-45861

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix slab-use-after-free in qd_put Commit a475c5dd16e5 ("gfs2: Free quota data objects synchronously") started freeing quo…

Published May 27, 2026CWE-416EPSS 0.16%

Overview

CVE-2026-45861 is a high-severity vulnerability. It was published on May 27, 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:

gfs2: Fix slab-use-after-free in qd_put

Commit a475c5dd16e5 ("gfs2: Free quota data objects synchronously")

started freeing quota data objects during filesystem shutdown instead of

putting them back onto the LRU list, but it failed to remove these

objects from the LRU list, causing LRU list corruption. This caused

use-after-free when the shrinker (gfs2_qd_shrink_scan) tried to access

already-freed objects on the LRU list.

Fix this by removing qd objects from the LRU list before freeing them in

qd_put().

Initial fix from Deepanshu Kartikey <[email protected]>.

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/1d47922b98046b8070a77347fb883a6523792803Refgit.kernel.org/stable/c/22150a7d401d9e9169b9b68e05bed95f7f49bf69Refgit.kernel.org/stable/c/80fff26d7a0c3926b511661c27eecc811a420eefRefgit.kernel.org/stable/c/ca7c67bdd293089b3483f18886d6b2d0037d2ad9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45861?

CVE-2026-45861 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-45861?

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-2026-45861?

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-2026-45861?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45861 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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