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Vulnerability record · CVE-2026-52920 · published 24 June 2026

CVE-2026-52920: Linux kernel vulnerability

Linux · Linux Kernel

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.

8.3 CVSS 3.1 High EPSS 0.30% · top 79.7%
8.3CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
8 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/392cc1d8408b5665215c1e9290bbf0f92339b043 Patch
https://git.kernel.org/stable/c/4b2b4d7d4e203c92db8966b163edfacb1f0e1e29 Patch
https://git.kernel.org/stable/c/82664d0f1ba25e4f9a71994954abae24c60f4067 Patch
https://git.kernel.org/stable/c/938867e870fb5471bb16f442aeac81326e05bf65 Patch
https://git.kernel.org/stable/c/b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9 Patch
https://git.kernel.org/stable/c/eb323f7b82d2e2f638de0cc2a177803eb20e0707 Patch
https://git.kernel.org/stable/c/f98b7f85e04b40e28b08c461ded0cc79f14f5509 Patch
https://git.kernel.org/stable/c/fc1c518bb1f054831ecabb32da9b8e1dff9699c6 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-52920), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.