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CVE-2023-52731

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix invalid page access after closing deferred I/O devices When a fbdev with deferred I/O is once opened and closed, the…

Published May 21, 2024CWE-125EPSS 0.25%

Overview

CVE-2023-52731 is a high-severity vulnerability. It was published on May 21, 2024 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:

fbdev: Fix invalid page access after closing deferred I/O devices

When a fbdev with deferred I/O is once opened and closed, the dirty

pages still remain queued in the pageref list, and eventually later

those may be processed in the delayed work. This may lead to a

corruption of pages, hitting an Oops.

This patch makes sure to cancel the delayed work and clean up the

pageref list at closing the device for addressing the bug. A part of

the cleanup code is factored out as a new helper function that is

called from the common fb_release().

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/3efc61d95259956db25347e2a9562c3e54546e20Refgit.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9Refgit.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149Refgit.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20Refgit.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9Refgit.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52731?

CVE-2023-52731 is a high-severity vulnerability. It was published on May 21, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-52731?

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-2023-52731?

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-2023-52731?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52731 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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