What’s Vulnerable › Vulnerabilities

CVE-2026-46324: netfilter: nf_tables: use list_del_rcu for netlink hooks

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-10-30
• Weakness: CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: use list_del_rcu for netlink hooks nft_netdev_unregister_hooks and __nft_unregister_flowtable_net_hooks need to use list_del_rcu(), this list can be walked by concurrent dumpers. Add a new helper and use it consistently.

Affected products

• Linux kernel: from 4.19.316 before 4.20; from 5.4.262 before 5.5; from 5.10.198 before 5.11; from 5.15.45 before 5.16; from 5.17.13 before 5.18; from 5.18.2 before 6.18.33 — fixed in 4.20, 5.5, 5.11, 5.16, 5.18, 6.18.33
• Linux: from 4.19.316 before 4.20; from 5.4.262 before 5.5; from 5.10.198 before 5.11; from 5.15.45 before 5.16; from 5.17.13 before 5.18; from 5.18.2 before 5.19 — fixed in 4.20, 5.5, 5.11, 5.16, 5.18, 5.19

How to fix

Upgrade to a fixed version: Linux kernel 4.20, 5.5, 5.11, 5.16; Linux 4.20, 5.5, 5.11, 5.16. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0bd93ce4f3c35e845532184331d7917d7e562c80
• https://git.kernel.org/stable/c/0f33e8ad6ac563ae2233dd7f75884e0ee010521d
• https://git.kernel.org/stable/c/2405730fde96f7fa483a5862e323b681e0e09f54
• https://git.kernel.org/stable/c/6480ea533cedfbf79ea5a1f12c5f71d41484dd8a
• https://git.kernel.org/stable/c/f3224ee463f8f6f6ced7dcdf6081add4f8128527
• https://git.kernel.org/stable/c/fe45e203527af8a2c0dc4c8a7b56c09c74b796c8

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