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.

A flaw was identified in the Linux kernel's netfilter xtables component. This vulnerability allowed certain network filtering rules, specifically those involving `xt_mac`, `xt_owner`, `xt_physdev`, and `xt_realm` matches, to be applied outside of their intended internet protocol (IPv4 and IPv6) contexts. This could enable an attacker to bypass established network security policies, potentially leading to unauthorized network access or unintended packet processing.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53001 https://nvd.nist.gov/vuln/detail/CVE-2026-53001 https://lore.kernel.org/linux-cve-announce/2026062447-CVE-2026-53001-160e@gregkh/T