CVE-2022-50167 (GCVE-0-2022-50167)
Vulnerability from cvelistv5
Published
2025-06-18 11:03
Modified
2025-06-18 11:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit overflow when accessing ARRAY map element If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elem_size are u32. Fix this everywhere by forcing 64-bit multiplication. Extract this formula into separate small helper and use it consistently in various places. Speculative-preventing formula utilizing index_mask trick is left as is, but explicit u64 casts are added in both places.
References
Impacted products
Vendor Product Version
Linux Linux Version: c85d69135a9175c50a823d04d62d932312d037b3
Version: c85d69135a9175c50a823d04d62d932312d037b3
Version: c85d69135a9175c50a823d04d62d932312d037b3
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/arraymap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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            {
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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                  "versionStartIncluding": "5.3",
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                }
              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix potential 32-bit overflow when accessing ARRAY map element\n\nIf BPF array map is bigger than 4GB, element pointer calculation can\noverflow because both index and elem_size are u32. Fix this everywhere\nby forcing 64-bit multiplication. Extract this formula into separate\nsmall helper and use it consistently in various places.\n\nSpeculative-preventing formula utilizing index_mask trick is left as is,\nbut explicit u64 casts are added in both places."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:03:20.997Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862"
        },
        {
          "url": "https://git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4"
        }
      ],
      "title": "bpf: fix potential 32-bit overflow when accessing ARRAY map element",
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50167",
    "datePublished": "2025-06-18T11:03:20.997Z",
    "dateReserved": "2025-06-18T10:57:27.426Z",
    "dateUpdated": "2025-06-18T11:03:20.997Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50167\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:47.010\",\"lastModified\":\"2025-06-18T13:47:40.833\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: fix potential 32-bit overflow when accessing ARRAY map element\\n\\nIf BPF array map is bigger than 4GB, element pointer calculation can\\noverflow because both index and elem_size are u32. Fix this everywhere\\nby forcing 64-bit multiplication. Extract this formula into separate\\nsmall helper and use it consistently in various places.\\n\\nSpeculative-preventing formula utilizing index_mask trick is left as is,\\nbut explicit u64 casts are added in both places.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: se corrige un posible desbordamiento de 32 bits al acceder al elemento del mapa de matriz. Si el mapa de matriz BPF supera los 4 GB, el c\u00e1lculo del puntero del elemento puede desbordarse, ya que tanto el \u00edndice como el tama\u00f1o de elem son u32. Se corrige este problema en todas partes forzando la multiplicaci\u00f3n de 64 bits. Se extrae esta f\u00f3rmula en un peque\u00f1o ayudante independiente y se usa de forma consistente en varios lugares. La f\u00f3rmula que evita la especulaci\u00f3n mediante el truco de index_mask se mantiene sin cambios, pero se a\u00f1aden conversiones u64 expl\u00edcitas en ambos lugares.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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