CVE-2026-45905 xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix iprtbug race in icmproutelookup reverse path icmproutelookup performs multiple route lookups to find a suitable route for sending ICMP error messages, with special handling for XFRM IPsec policies. The lookup sequence i...

CVE-2026-45905

CVE-2026-45905 is a Linux kernel networking vulnerability in the xfrm/icmp_route_lookup reverse path. The race occurs during ICMP error handling when a concurrent address change may cause ip_route_input() to return a LOCAL route with a dst that can trigger a WARN_ON in ip_rt_bug. The fix checks t...