What’s Vulnerable › Vulnerabilities

CVE-2026-45901: netfilter: nf_tables: revert commit_mutex usage in reset path

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-21

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.

Affected products

• Linux kernel: from 6.1.107 before 6.2; from 6.6.48 before 6.19.4 — fixed in 6.19.4, 6.2

How to fix

Upgrade to a fixed version: Linux kernel 6.19.4, 6.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/7f261bb906bf527c4a6e2a646e2d5f3679f2a8bc
• https://git.kernel.org/stable/c/b0dd8637fbaae8405eb9e8de741f9ce7c9667b6f
• https://git.kernel.org/stable/c/d66bedfe97a2bc321fa8118e669aae988038f729
• https://git.kernel.org/stable/c/ee3978b6a0dcd4215cb7cedcba705a12174786a7
• https://git.kernel.org/stable/c/f6410d18c1e2da325df02be989d5bca5ed38b086

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