What’s Vulnerable › Vulnerabilities

CVE-2026-74565: netfilter: nf_tables: make nft_object rhltable per table

• 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: 2026-08-15 · updated 2026-10-21

Description

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().

Affected products

• Linux kernel: 5.1 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1948e4f85b855618b5b9a27265f98d816f4cb7cb
• https://git.kernel.org/stable/c/4b549d32d34ee765527e63726bb1af984876e776
• https://git.kernel.org/stable/c/523c881661dde67efb44fce38c8eed50a72a57c1
• https://git.kernel.org/stable/c/63ba12b664a2cd3220ed43e22c717715f4cc2ae8
• https://git.kernel.org/stable/c/71714a2cec6c6d79bbd425ad968f9d6a3e4a2066
• https://git.kernel.org/stable/c/7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3af
• https://git.kernel.org/stable/c/f4f699790590bd0896c48a71e9232a65198f92f0

Get alerted when CVE-2026-74565 or the next vulnerability affects your stack