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CVE-2026-53048

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: gfs2: prevent NULL pointer dereference during unmount When flushing out outstanding glock work during an unmount, gfs2_log_flus…

Published Jun 24, 2026CWE-476EPSS 0.12%

Overview

CVE-2026-53048 is a medium-severity vulnerability. It was published on June 24, 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:

gfs2: prevent NULL pointer dereference during unmount

When flushing out outstanding glock work during an unmount, gfs2_log_flush()

can be called when sdp->sd_jdesc has already been deallocated and sdp->sd_jdesc

is NULL. Commit 35264909e9d1 ("gfs2: Fix NULL pointer dereference in

gfs2_log_flush") added a check for that to gfs2_log_flush() itself, but it

missed the sdp->sd_jdesc dereference in gfs2_log_release(). Fix that.

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/233a0945a4b1dbe3f38c30afb7d05b76c67f1193Refgit.kernel.org/stable/c/2fc4c868c9060f424fd4a7cacb0aec5082aba4deRefgit.kernel.org/stable/c/74b4dbb946060a3233604d91859a9abd3708141dRefgit.kernel.org/stable/c/abd73229f0e886a91a16ea781ab656bd9b4d1ee8Refgit.kernel.org/stable/c/cec55674354794eddb80b914f73a6bf9b7fc304aRefgit.kernel.org/stable/c/d8ffae016c4a78693fe1283335d0b6833a9c1366Refgit.kernel.org/stable/c/e15f16761594e80b15776980b27c35477655a135

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53048?

CVE-2026-53048 is a medium-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-53048?

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-2026-53048?

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-2026-53048?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53048 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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