CVE-2026-46266inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
Updated under an hour ago ()
Does this affect you?
It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 47276297140ee6712646f9b19fb04fe26daedd01; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before db76b75ede3810e7cf9cfea5067d4f3e0993768b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 19e42490c89bac9a388f28179e66bebbef350f99; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 531c1aec81bfe19d00af13da5531fbb8209e4bd2; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 719d3932b8f6e3348ce2f0ac58e278301fc17575; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c89477ad79446867394360b29bb801010fc3ff22 | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.12.1 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4; 2.6.12; 2.6.12; 2.6.12; 2.6.12; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/47276297140ee6712646f9b19fb04fe26daedd01
- https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768bpatch
- https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99patch
- https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2patch
- https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575patch
- https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.