CVE-2026-31674 netfilter: ip6t_rt: reject oversized addrnr in rt_mt6_check()

In the Linux kernel, the following vulnerability has been resolved: netfilter: ip6trt: reject oversized addrnr in rtmt6check Reject rt match rules whose addrnr exceeds IP6TRTHOPS. rtmt6 expects addrnr to stay within the bounds of rtinfo-addrs. Validate addrnr during rule installation so malformed...