CVE-2026-74565

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < 4b549d32d34ee765527e63726bb1af984876e776affected
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < 523c881661dde67efb44fce38c8eed50a72a57c1affected
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < 1948e4f85b855618b5b9a27265f98d816f4cb7cbaffected
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < 63ba12b664a2cd3220ed43e22c717715f4cc2ae8affected
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < 7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3afaffected
LinuxLinux4d44175aa5bb5f68772b1eb0306554812294ca52 < f4f699790590bd0896c48a71e9232a65198f92f0affected
LinuxLinux5.1affected
LinuxLinux0 < 5.1unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References