netfilter: nf_tables: make nft_object rhltable per table
CVE-2026-74565 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74565?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 4d44175aa5bb5f68772b1eb0306554812294ca52 to < 4b549d32d34ee765527e63726bb1af984876e776, 4d44175aa5bb5f68772b1eb0306554812294ca52 to < 523c881661dde67efb44fce38c8eed50a72a57c1, 4d44175aa5bb5f68772b1eb0306554812294ca52 to < 71714a2cec6c6d79bbd425ad968f9d6a3e4a2066, 4d44175aa5bb5f68772b1eb0306554812294ca52 to < 1948e4f85b855618b5b9a27265f98d816f4cb7cb
- Linux Linux: 5.1
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: make nft_object rhltable per table
The nft_object rhltable is global, this allows for accessing objects
that are being dismangled from lookup path by other existing netns.
Given the nft_obj_destroy() releases the object inmediately, this might
lead to use-after-free of these objects that are being released.
Make the existing rhltable per table to address this issue to deal with
with the nft_rcv_nl_event() path too.
Update nft_obj_lookup() to take the table as non-const, otherwise,
compiler complains when passing the objname_ht to rhltable_lookup().
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/4b549d32d34ee765527e63726bb1af984876e776
- git.kernel.org/stable/c/523c881661dde67efb44fce38c8eed50a72a57c1
- git.kernel.org/stable/c/71714a2cec6c6d79bbd425ad968f9d6a3e4a2066
- git.kernel.org/stable/c/1948e4f85b855618b5b9a27265f98d816f4cb7cb
- git.kernel.org/stable/c/63ba12b664a2cd3220ed43e22c717715f4cc2ae8
- git.kernel.org/stable/c/7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3af
- git.kernel.org/stable/c/f4f699790590bd0896c48a71e9232a65198f92f0
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON