CVE-2026-45901

netfilter: nf_tables: revert commit_mutex usage in reset path

MEDIUM

5.5

CVSS Score

Published: May 27, 2026 at 12:17 PM UTC

Updated: October 21, 2026 at 01:18 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.1.107 ≤ v < 6.26.6.48 ≤ v < 6.19.43cb03edb4de33fd04c4ea55f47397b96a8657c536.1.107 6.6.48 6.7f123293db16dcd0cd81b246ae60e6362f0025d0afb1adb05ea87b6149e65a31e511756c4f470d0cd

Vendor states this is fixed in 7f261bb906bf527c4a6e2a646e2d5f3679f2a8bc (fixed)

Vendor states this is fixed in d66bedfe97a2bc321fa8118e669aae988038f729 (fixed)

Vendor states this is fixed in ee3978b6a0dcd4215cb7cedcba705a12174786a7 (fixed)

Vendor states this is fixed in f6410d18c1e2da325df02be989d5bca5ed38b086 (fixed)

Vendor states this is fixed in 6.12.101 (unaffected)

Vendor states this is fixed in 6.18.42 (unaffected)

Vendor states this is fixed in 6.19.4 (unaffected)

Affected range stops below 6.2, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.6.160 (unaffected)

Vendor states this is fixed in 6.7 (unaffected)

Vendor states this is fixed in 7.0 (unaffected)