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CVE-2023-52581

6.3 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to swi…

Published Mar 2, 2024CWE-401EPSS 0.26%

Overview

CVE-2023-52581 is a medium-severity vulnerability. It was published on March 2, 2024 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.3, 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:

netfilter: nf_tables: fix memleak when more than 255 elements expired

When more than 255 elements expired we're supposed to switch to a new gc

container structure.

This never happens: u8 type will wrap before reaching the boundary

and nft_trans_gc_space() always returns true.

This means we recycle the initial gc container structure and

lose track of the elements that came before.

While at it, don't deref 'gc' after we've passed it to call_rcu.

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/09c85f2d21ab6b5acba31a037985b13e8e6565b8Refgit.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14Refgit.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125Refgit.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07Refgit.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01Refgit.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5Refgit.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171Refgit.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8Refgit.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14Refgit.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52581?

CVE-2023-52581 is a medium-severity vulnerability. It was published on March 2, 2024 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2023-52581?

This vulnerability has a CVSS 3.1 base score of 6.3, 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-2023-52581?

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-2023-52581?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52581 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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