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().
References7
- git.kernel.org/stable/c/1948e4f85b855618b5b9a27265f98d816f4cb7cb
- git.kernel.org/stable/c/4b549d32d34ee765527e63726bb1af984876e776
- git.kernel.org/stable/c/523c881661dde67efb44fce38c8eed50a72a57c1
- git.kernel.org/stable/c/63ba12b664a2cd3220ed43e22c717715f4cc2ae8
- git.kernel.org/stable/c/71714a2cec6c6d79bbd425ad968f9d6a3e4a2066
- git.kernel.org/stable/c/7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3af
- git.kernel.org/stable/c/f4f699790590bd0896c48a71e9232a65198f92f0
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 11 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.