CVE-2026-52920

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < eb323f7b82d2e2f638de0cc2a177803eb20e0707affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < fc1c518bb1f054831ecabb32da9b8e1dff9699c6affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < f98b7f85e04b40e28b08c461ded0cc79f14f5509affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < 82664d0f1ba25e4f9a71994954abae24c60f4067affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < b130a6eefa02bd4d475f2f059da8bcfb3e7d18d9affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < 938867e870fb5471bb16f442aeac81326e05bf65affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < 392cc1d8408b5665215c1e9290bbf0f92339b043affected
LinuxLinuxc4b885139203d37f76662c37ae645fe8e0f4e4e5 < 4b2b4d7d4e203c92db8966b163edfacb1f0e1e29affected
LinuxLinux2.6.17affected
LinuxLinux0 < 2.6.17unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.141 <= 6.6.*unaffected
LinuxLinux6.12.91 <= 6.12.*unaffected
LinuxLinux6.18.33 <= 6.18.*unaffected
LinuxLinux7.0.10 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References