netfilter: xtables: restrict several matches to inet family
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.
02 / AFFECTED SOFTWARE
Affected packages
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/14203f9edf944b3fb63faadd62f38452421ecdfc
- https://git.kernel.org/stable/c/689a91ff18d6448d94c1ab7c076fecdb2b668bef
- https://git.kernel.org/stable/c/76160e04440c9698b989dbd9492a7ec4f520c9ee
- https://git.kernel.org/stable/c/7eaf9c740f33230cb224dc265f3c69f8531ff57b
- https://git.kernel.org/stable/c/9a109751b297b0f2135495749ef5a18ba31ec7d4
- https://git.kernel.org/stable/c/b6fe26f86a1649f84e057f3f15605b08eda15497
- https://git.kernel.org/stable/c/cbeb259f31382de70a70a59ffd0e66f5e80d9818
- https://git.kernel.org/stable/c/fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53001.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-53001