CVE-2026-46266

Descrição

In the Linux kernel, the following vulnerability has been resolved: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP Yizhou Zhao reported that simply having one RAW socket on protocol IPPROTO_RAW (255) was dangerous. socket(AF_INET, SOCK_RAW, 255); A malicious incoming ICMP packet can set the protocol field to 255 and match this socket, leading to FNHE cache changes. inner = IP(src=-192.168.2.1-, dst=-8.8.8.8-, proto=255)/Raw(-TEST-) pkt = IP(src=-192.168.1.1-, dst=-192.168.2.1-)/ICMP(type=3, code=4, nexthopmtu=576)/inner -man 7 raw- states: A protocol of IPPROTO_RAW implies enabled IP_HDRINCL and is able to send any IP protocol that is specified in the passed header. Receiving of all IP protocols via IPPROTO_RAW is not possible using raw sockets. Make sure we drop these malicious packets.