CVE-2026-53001

netfilter: xtables: restrict several matches to inet family

MEDIUM

5.5

CVSS Score

Published: June 24, 2026 at 04:29 PM UTC

Updated: October 15, 2026 at 02:19 AM UTC

4 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: restrict several matches to inet family This is a partial revert of: commit ab4f21e6fb1c ("netfilter: xtables: use NFPROTO_UNSPEC in more extensions") to allow ipv4 and ipv6 only. - xt_mac - xt_owner - xt_physdev These extensions are not used by ebtables in userspace. Moreover, xt_realm is only for ipv4, since dst->tclassid is ipv4 specific.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.28 ≤ v < 5.10.2585.11 ≤ v < 5.15.2095.16 ≤ v < 6.1.1756.13 ≤ v < 6.18.336.19 ≤ v < 7.0.106.2 ≤ v < 6.6.1416.7 ≤ v < 6.12.912.6.28ab4f21e6fb1c09b13c4c3cb8357babe8223471bd

Vendor states this is fixed in 14203f9edf944b3fb63faadd62f38452421ecdfc (fixed)

Vendor states this is fixed in 689a91ff18d6448d94c1ab7c076fecdb2b668bef (fixed)

Vendor states this is fixed in 76160e04440c9698b989dbd9492a7ec4f520c9ee (fixed)

Vendor states this is fixed in 7eaf9c740f33230cb224dc265f3c69f8531ff57b (fixed)

Vendor states this is fixed in 9a109751b297b0f2135495749ef5a18ba31ec7d4 (fixed)

Vendor states this is fixed in b6fe26f86a1649f84e057f3f15605b08eda15497 (fixed)

Vendor states this is fixed in cbeb259f31382de70a70a59ffd0e66f5e80d9818 (fixed)

Vendor states this is fixed in fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9 (fixed)

Vendor states this is fixed in 2.6.28 (unaffected)

Vendor states this is fixed in 5.10.258 (unaffected)

Vendor states this is fixed in 5.15.209 (unaffected)

Vendor states this is fixed in 6.1.175 (unaffected)