CVE-2026-53001

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.

Score

CVSS 3.1 5.5 Medium

Status

Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-06-24

Last modified

2026-10-15

Affected products

• Linux Kernel (Linux)
• Simatic S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)
• Simatic S7-1500 Cpu 1518f-4 Pndp Mfp (Siemens)
• Siplus S7-1500 Cpu 1518-4 Pndp Mfp (Siemens)

References

• https://git.kernel.org/stable/c/14203f9edf944b3fb63faadd62f38452421ecdfc
• https://git.kernel.org/stable/c/7eaf9c740f33230cb224dc265f3c69f8531ff57b
• https://git.kernel.org/stable/c/9a109751b297b0f2135495749ef5a18ba31ec7d4
• https://git.kernel.org/stable/c/cbeb259f31382de70a70a59ffd0e66f5e80d9818
• https://git.kernel.org/stable/c/689a91ff18d6448d94c1ab7c076fecdb2b668bef
• https://git.kernel.org/stable/c/76160e04440c9698b989dbd9492a7ec4f520c9ee
• https://git.kernel.org/stable/c/fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9
• https://git.kernel.org/stable/c/b6fe26f86a1649f84e057f3f15605b08eda15497
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html