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CVE-2023-52923

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: adapt set backend to use GC transaction API Use the GC transaction API to replace the old and buggy gc AP…

Published Jan 20, 2025EPSS 0.26%

Overview

CVE-2023-52923 is a high-severity vulnerability. It was published on January 20, 2025 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:

netfilter: nf_tables: adapt set backend to use GC transaction API

Use the GC transaction API to replace the old and buggy gc API and the

busy mark approach.

No set elements are removed from async garbage collection anymore,

instead the _DEAD bit is set on so the set element is not visible from

lookup path anymore. Async GC enqueues transaction work that might be

aborted and retried later.

rbtree and pipapo set backends does not set on the _DEAD bit from the

sync GC path since this runs in control plane path where mutex is held.

In this case, set elements are deactivated, removed and then released

via RCU callback, sync GC never fails.

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/146c76866795553dbc19998f36718d7986ad302bRefgit.kernel.org/stable/c/479a2cf5259347d6a1f658b0f791d27a34908e91Refgit.kernel.org/stable/c/c357648929c8dff891502349769aafb8f0452bc2Refgit.kernel.org/stable/c/cb4d00b563675ba8ff6ef94b077f58d816f68ba3Refgit.kernel.org/stable/c/df650d6a4bf47248261b61ef6b174d7c54034d15Refgit.kernel.org/stable/c/e4d71d6a9c7db93f7bf20c3a0f0659d63d7de681Refgit.kernel.org/stable/c/f6c383b8c31a93752a52697f8430a71dcbc46adf

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52923?

CVE-2023-52923 is a high-severity vulnerability. It was published on January 20, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2023-52923?

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-2023-52923?

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-2023-52923?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52923 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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