CVE-2026-46266inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
- 9.1CriticalCVSS base score
- 0.46%Exploitation in 30 daysEPSS · top 59% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 21 days later
· 21 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.46% · top 59% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 47276297140ee6712646f9b19fb04fe26daedd01
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < db76b75ede3810e7cf9cfea5067d4f3e0993768b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 19e42490c89bac9a388f28179e66bebbef350f99
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 531c1aec81bfe19d00af13da5531fbb8209e4bd2
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 719d3932b8f6e3348ce2f0ac58e278301fc17575
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c89477ad79446867394360b29bb801010fc3ff22
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 6.1.187 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References6
- https://git.kernel.org/stable/c/47276297140ee6712646f9b19fb04fe26daedd01 (opens in a new tab)
- https://git.kernel.org/stable/c/db76b75ede3810e7cf9cfea5067d4f3e0993768b (opens in a new tab)
- https://git.kernel.org/stable/c/19e42490c89bac9a388f28179e66bebbef350f99 (opens in a new tab)
- https://git.kernel.org/stable/c/531c1aec81bfe19d00af13da5531fbb8209e4bd2 (opens in a new tab)
- https://git.kernel.org/stable/c/719d3932b8f6e3348ce2f0ac58e278301fc17575 (opens in a new tab)
- https://git.kernel.org/stable/c/c89477ad79446867394360b29bb801010fc3ff22 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-34128 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46266)Record last updated .