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CVE-2026-45901

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: revert commit_mutex usage in reset path It causes circular lock dependency between commit_mutex, nfnl_sub…

Published May 27, 2026EPSS 0.16%

Overview

CVE-2026-45901 is a medium-severity vulnerability. It was published on May 27, 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:

netfilter: nf_tables: revert commit_mutex usage in reset path

It causes circular lock dependency between commit_mutex, nfnl_subsys_ipset

and nlk_cb_mutex when nft reset, ipset list, and iptables-nft with '-m set'

rule run at the same time.

Previous patches made it safe to run individual reset handlers concurrently

so commit_mutex is no longer required to prevent this.

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/7f261bb906bf527c4a6e2a646e2d5f3679f2a8bcRefgit.kernel.org/stable/c/d66bedfe97a2bc321fa8118e669aae988038f729Refgit.kernel.org/stable/c/ee3978b6a0dcd4215cb7cedcba705a12174786a7Refgit.kernel.org/stable/c/f6410d18c1e2da325df02be989d5bca5ed38b086

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45901?

CVE-2026-45901 is a medium-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-45901?

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-2026-45901?

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-2026-45901?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45901 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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