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CVE-2026-53272

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: erofs: fix use-after-free on sbi->sync_decompress z_erofs_decompress_kickoff() can race with filesystem unmount, causing a use-…

Published Jun 25, 2026CWE-416EPSS 0.12%

Overview

CVE-2026-53272 is a high-severity vulnerability. It was published on June 25, 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:

erofs: fix use-after-free on sbi->sync_decompress

z_erofs_decompress_kickoff() can race with filesystem unmount, causing

a use-after-free on sbi->sync_decompress.

When I/O completes, z_erofs_endio() calls z_erofs_decompress_kickoff()

to queue z_erofs_decompressqueue_work() asynchronously. Then, after all

folios are unlocked, unmount workflow can proceed and sbi will be freed

before accessing to sbi->sync_decompress.

Thread (unmount) I/O completion kworker

queue_work

z_erofs_decompressqueue_work

(all folios are unlocked)

cleanup_mnt

..

erofs_kill_sb

erofs_sb_free

kfree(sbi)

access sbi->sync_decompress // UAF!!

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/00bf6868df65fa95b3854996246d15759fdc7070Refgit.kernel.org/stable/c/1aee05e814d292064bf5fa15733741040cdc48baRefgit.kernel.org/stable/c/86ab00cf81d44b675bb23db62b88fd76c8ac8ceaRefgit.kernel.org/stable/c/95caf60da33d87ed26c28993620f0d92487b0296

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53272?

CVE-2026-53272 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53272?

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-2026-53272?

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-2026-53272?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53272 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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