CVE-2026-52920

HIGH

netfilter: xt_policy: fix strict mode inbound policy matching

Title source: cna
STIX 2.1

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.

References (8)

Core 8

Scores

CVSS v3 8.3
EPSS 0.0030
EPSS Percentile 21.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Details

Status published
Products (27)
linux/Kernel 2.6.17 - 5.10.258linux
linux/Kernel 5.11.0 - 5.15.209linux
linux/Kernel 5.16.0 - 6.1.175linux
linux/Kernel 6.13.0 - 6.18.33linux
linux/Kernel 6.19.0 - 7.0.10linux
linux/Kernel 6.2.0 - 6.6.141linux
linux/Kernel 6.7.0 - 6.12.91linux
Linux/Linux < 2.6.17
Linux/Linux 2.6.17
Linux/Linux 5.10.258 - 5.10.*
... and 17 more
Published Jun 24, 2026
Tracked Since Jun 24, 2026