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CVE-2026-43099 ipv4: icmp: fix null-ptr-deref in icmp_build_probe()

🗓️ 06 May 2026 07:40:29Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 25 Views

IPv4 ICMP probe fix avoids null pointer dereference when IPv6 is inactive by silently discarding the request.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/icmp.c"
    ],
    "versions": [
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "0f21bc261e60f0c696c58841c4873ff77ed83673",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "dc5db4db19766a61ad65d81d1f55b1c1e51ba78d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "47a8bf52156ac7e7a581eca31c1f964ba4258d4d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "6be325206850a0891896d38bcf83a09d8b54ec48",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "f91b3ed9e7fa82a70511b5f6901c88379acf2964",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "5b9911582d441f72fe6ccb15ffe3303bbc07f6f5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d329ea5bd8845f0b196bf41b18b6173340d6e0e4",
        "lessThan": "fde29fd9349327acc50d19a0b5f3d5a6c964dfd8",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/ipv4/icmp.c"
    ],
    "versions": [
      {
        "version": "5.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.209",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.175",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.136",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.83",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.24",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.14",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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01 Jun 2026 16:14Current
CVSS 3.17.5
EPSS0.0049
25