CVE-2026-53001

MediumCVSS 5.5/10Last modified Nov 10, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 14203f9edf944b3fb63faadd62f38452421ecdfc; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 7eaf9c740f33230cb224dc265f3c69f8531ff57b; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 9a109751b297b0f2135495749ef5a18ba31ec7d4; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < cbeb259f31382de70a70a59ffd0e66f5e80d9818; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 689a91ff18d6448d94c1ab7c076fecdb2b668bef; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 76160e04440c9698b989dbd9492a7ec4f520c9ee; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9; >= ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < b6fe26f86a1649f84e057f3f15605b08eda15497
LinuxLinux2.6.28
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)>= V3.1.7, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)>= V3.1.6, < *
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)>= V3.1.7, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)>= V3.1.6, < *
SiemensSIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)>= V3.1.7, < *

References

Timeline

Published
Jun 24, 2026
Last modified
Nov 10, 2026
NVD status
Modified

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CVE-2026-53001: Medium severity, CVSS 5.5 | Vulnix