CVE-2026-46266
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.
- Score
- CVSS 3.1 9.1 Critical
- Status
- Modified - 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- Published
- 2026-06-03
- Last modified
- 2026-10-19
- Weaknesses
- CWE-20
Affected products
References
- https://git.kernel.org/stable/c/47276297140ee6712646f9b19fb04fe26daedd01
- https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b
- https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99
- https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2
- https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575
- https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22
