CVE-2026-46266 (GCVE-0-2026-46266)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:50 – Updated: 2026-08-05 12:30
VLAI
Title
inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP
Summary
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.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < db76b75ede3810e7cf9cfea5067d4f3e0993768b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 19e42490c89bac9a388f28179e66bebbef350f99 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 531c1aec81bfe19d00af13da5531fbb8209e4bd2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 719d3932b8f6e3348ce2f0ac58e278301fc17575 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c89477ad79446867394360b29bb801010fc3ff22 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:45:55+00:00",
      "cve": "CVE-2026-46266",
      "id": "CVE-2026-46266",
      "initial_release_date": "2026-06-03T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: inet: RAW sockets using IPPROTO_RAW MUST drop incoming ICMP",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46266.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-07-24T02:22:26Z",
      "cve": "CVE-2026-46266",
      "id": "CVE-2026-46266",
      "initial_release_date": "2026-06-04T02:21:43Z",
      "product_status:first_fixed": "55",
      "product_status:known_affected": "468",
      "product_status:recommended": "453",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46266",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46266.json",
      "version": "18"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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