CVE-2026-52920

netfilter: xt_policy: fix strict mode inbound policy matching

State: Published
Severity: 8.3 High
Published: Jun 24, 2026
Updated: Oct 19, 2026
Reserved: Jun 9, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_policy: fix strict mode inbound policy matching

match_policy_in() walks sec_path entries from the last transform to the first one, but strict policy matching needs to consume info->pol[] in the same forward order as the rule layout.

Derive the strict-match policy position from the number of transforms already consumed so that multi-element inbound rules are matched consistently.

Scores

CVSS	Score	Vector	Source
3.1	8.3 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H	Linux

Weaknesses

CWE-682 Incorrect Calculation

Affected Products

Product	Versions
LinuxLinux	c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before eb323f7b82d2e2f638de0cc2a177803eb20e0707Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before fc1c518bb1f054831ecabb32da9b8e1dff9699c6Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before f98b7f85e04b40e28b08c461ded0cc79f14f5509Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 82664d0f1ba25e4f9a71994954abae24c60f4067Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 938867e870fb5471bb16f442aeac81326e05bf65Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 392cc1d8408b5665215c1e9290bbf0f92339b043Affected c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 4b2b4d7d4e203c92db8966b163edfacb1f0e1e29Affected
LinuxLinux	2.6.17Affected before 2.6.17Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.141 through 6.6.Not affected 6.12.91 through 6.12.Not affected 6.18.33 through 6.18.Not affected 7.0.10 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before eb323f7b82d2e2f638de0cc2a177803eb20e0707Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before fc1c518bb1f054831ecabb32da9b8e1dff9699c6Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before f98b7f85e04b40e28b08c461ded0cc79f14f5509Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 82664d0f1ba25e4f9a71994954abae24c60f4067Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 938867e870fb5471bb16f442aeac81326e05bf65Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 392cc1d8408b5665215c1e9290bbf0f92339b043Affected
c4b885139203d37f76662c37ae645fe8e0f4e4e5 to before 4b2b4d7d4e203c92db8966b163edfacb1f0e1e29Affected

LinuxLinux

2.6.17Affected
before 2.6.17Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.141 through 6.6.*Not affected
6.12.91 through 6.12.*Not affected
6.18.33 through 6.18.*Not affected
7.0.10 through 7.0.*Not affected
7.1 and laterNot affected

References

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