CVE-2026-46037 (GCVE-0-2026-46037)
Vulnerability from cvelistv5
Published
2026-05-27 12:56
Modified
2026-06-14 17:49
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: validate reply type before using icmp_pointers Extended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type. That value is outside the range covered by icmp_pointers[], which only describes the traditional ICMP types up to NR_ICMP_TYPES. Avoid consulting icmp_pointers[] for reply types outside that range, and use array_index_nospec() for the remaining in-range lookup. Normal ICMP replies keep their existing behavior unchanged.
Impacted products
Vendor Product Version
Linux Linux Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
Version: d329ea5bd8845f0b196bf41b18b6173340d6e0e4
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{
  "containers": {
    "cna": {
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          "product": "Linux",
          "programFiles": [
            "net/ipv4/icmp.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: icmp: validate reply type before using icmp_pointers\n\nExtended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type.\nThat value is outside the range covered by icmp_pointers[], which only\ndescribes the traditional ICMP types up to NR_ICMP_TYPES.\n\nAvoid consulting icmp_pointers[] for reply types outside that range, and\nuse array_index_nospec() for the remaining in-range lookup. Normal ICMP\nreplies keep their existing behavior unchanged."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:49:43.163Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99"
        },
        {
          "url": "https://git.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706b"
        },
        {
          "url": "https://git.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759"
        },
        {
          "url": "https://git.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1"
        },
        {
          "url": "https://git.kernel.org/stable/c/67bf002a2d7387a6312138210d0bd06e3cf4879b"
        }
      ],
      "title": "ipv4: icmp: validate reply type before using icmp_pointers",
      "x_generator": {
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46037",
    "datePublished": "2026-05-27T12:56:47.795Z",
    "dateReserved": "2026-05-13T15:03:33.093Z",
    "dateUpdated": "2026-06-14T17:49:43.163Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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