CVE-2026-74565

netfilter: nf_tables: make nft_object rhltable per table

State: Published
Severity: 7.8 High
Published: Aug 15, 2026
Updated: Oct 21, 2026
Reserved: Aug 15, 2026

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().

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4d44175aa5bb5f68772b1eb0306554812294ca52 to before 4b549d32d34ee765527e63726bb1af984876e776Affected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before 523c881661dde67efb44fce38c8eed50a72a57c1Affected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before 71714a2cec6c6d79bbd425ad968f9d6a3e4a2066Affected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before 1948e4f85b855618b5b9a27265f98d816f4cb7cbAffected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before 63ba12b664a2cd3220ed43e22c717715f4cc2ae8Affected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before 7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3afAffected 4d44175aa5bb5f68772b1eb0306554812294ca52 to before f4f699790590bd0896c48a71e9232a65198f92f0Affected
LinuxLinux	5.1Affected before 5.1Not affected 5.10.270 through 5.10.Not affected 6.1.188 through 6.1.Not affected 6.6.160 through 6.6.Not affected 6.12.103 through 6.12.Not affected 6.18.44 through 6.18.Not affected 7.1.8 through 7.1.Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

4d44175aa5bb5f68772b1eb0306554812294ca52 to before 4b549d32d34ee765527e63726bb1af984876e776Affected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before 523c881661dde67efb44fce38c8eed50a72a57c1Affected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before 71714a2cec6c6d79bbd425ad968f9d6a3e4a2066Affected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before 1948e4f85b855618b5b9a27265f98d816f4cb7cbAffected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before 63ba12b664a2cd3220ed43e22c717715f4cc2ae8Affected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before 7d4789b58761d9d48d9b5f5e7e0a510c3bbfb3afAffected
4d44175aa5bb5f68772b1eb0306554812294ca52 to before f4f699790590bd0896c48a71e9232a65198f92f0Affected

LinuxLinux

5.1Affected
before 5.1Not affected
5.10.270 through 5.10.*Not affected
6.1.188 through 6.1.*Not affected
6.6.160 through 6.6.*Not affected
6.12.103 through 6.12.*Not affected
6.18.44 through 6.18.*Not affected
7.1.8 through 7.1.*Not affected
7.2 and laterNot affected

References

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