CVE-2022-50212 (GCVE-0-2022-50212)
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: netfilter: nf_tables: do not allow CHAIN_ID to refer to another table When doing lookups for chains on the same batch by using its ID, a chain from a different table can be used. If a rule is added to a table but refers to a chain in a different table, it will be linked to the chain in table2, but would have expressions referring to objects in table1. Then, when table1 is removed, the rule will not be removed as its linked to a chain in table2. When expressions in the rule are processed or removed, that will lead to a use-after-free. When looking for chains by ID, use the table that was used for the lookup by name, and only return chains belonging to that same table.
References
Impacted products
Vendor Product Version
Linux Linux Version: 837830a4b439bfeb86c70b0115c280377c84714b
Version: 837830a4b439bfeb86c70b0115c280377c84714b
Version: 837830a4b439bfeb86c70b0115c280377c84714b
Version: 837830a4b439bfeb86c70b0115c280377c84714b
Version: 837830a4b439bfeb86c70b0115c280377c84714b
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
          ],
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          "vendor": "Linux",
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          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.10.137",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.61",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.18",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.19.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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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\nnetfilter: nf_tables: do not allow CHAIN_ID to refer to another table\n\nWhen doing lookups for chains on the same batch by using its ID, a chain\nfrom a different table can be used. If a rule is added to a table but\nrefers to a chain in a different table, it will be linked to the chain in\ntable2, but would have expressions referring to objects in table1.\n\nThen, when table1 is removed, the rule will not be removed as its linked to\na chain in table2. When expressions in the rule are processed or removed,\nthat will lead to a use-after-free.\n\nWhen looking for chains by ID, use the table that was used for the lookup\nby name, and only return chains belonging to that same table."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:03:50.366Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583"
        },
        {
          "url": "https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11"
        },
        {
          "url": "https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620"
        },
        {
          "url": "https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e"
        }
      ],
      "title": "netfilter: nf_tables: do not allow CHAIN_ID to refer to another table",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50212",
    "datePublished": "2025-06-18T11:03:50.366Z",
    "dateReserved": "2025-06-18T10:57:27.429Z",
    "dateUpdated": "2025-06-18T11:03:50.366Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50212\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:52.087\",\"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\\nnetfilter: nf_tables: do not allow CHAIN_ID to refer to another table\\n\\nWhen doing lookups for chains on the same batch by using its ID, a chain\\nfrom a different table can be used. If a rule is added to a table but\\nrefers to a chain in a different table, it will be linked to the chain in\\ntable2, but would have expressions referring to objects in table1.\\n\\nThen, when table1 is removed, the rule will not be removed as its linked to\\na chain in table2. When expressions in the rule are processed or removed,\\nthat will lead to a use-after-free.\\n\\nWhen looking for chains by ID, use the table that was used for the lookup\\nby name, and only return chains belonging to that same table.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfilter: nf_tables: no permitir que CHAIN_ID haga referencia a otra tabla Al realizar b\u00fasquedas de cadenas en el mismo lote usando su ID, se puede usar una cadena de una tabla diferente. Si se agrega una regla a una tabla pero hace referencia a una cadena en una tabla diferente, se vincular\u00e1 a la cadena en la tabla2, pero tendr\u00eda expresiones que hacen referencia a objetos en la tabla1. Luego, cuando se elimina la tabla1, la regla no se eliminar\u00e1 ya que est\u00e1 vinculada a una cadena en la tabla2. Cuando se procesan o eliminan expresiones en la regla, eso conducir\u00e1 a un Use-After-Free. Al buscar cadenas por ID, use la tabla que se us\u00f3 para la b\u00fasqueda por nombre y solo devuelva las cadenas que pertenecen a esa misma tabla.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0f49613a213d918af790c1276f79da741968de11\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/58e863f64ee3d0879297e5e53b646e4b91e59620\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/91501513016903077f91033fa5d2aa26cac399b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/95f466d22364a33d183509629d0879885b4f547e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9e7dcb88ec8e85e4a8ad0ea494ea2f90f32d2583\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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