CVE-2026-46266
critical · 9.1In 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| linux | linux_kernel | >= 2.6.12.1, < 6.6.128 |
| linux | linux_kernel | >= 6.7, < 6.12.75 |
| linux | linux_kernel | >= 6.13, < 6.18.14 |
| linux | linux_kernel | >= 6.19, < 6.19.4 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
| linux | linux_kernel | 2.6.12 |
Check a specific version with /api/v1/cve/match.
References
- https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99
- https://git.kernel.org/stable/c/47276297140ee6712646f9b19fb04fe26daedd01
- https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2
- https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575
- https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22
- https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b
Query this programmatically:
curl https://evil-db.io/api/v1/cve/CVE-2026-46266