{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52531",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52531"
  ],
  "published": "2024-03-02T21:53:07Z",
  "summary": "wifi: iwlwifi: mvm: Fix a memory corruption issue",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: mvm: Fix a memory corruption issue\n\nA few lines above, space is kzalloc()'ed for:\n\tsizeof(struct iwl_nvm_data) +\n\tsizeof(struct ieee80211_channel) +\n\tsizeof(struct ieee80211_rate)\n\n'mvm->nvm_data' is a 'struct iwl_nvm_data', so it is fine.\n\nAt the end of this structure, there is the 'channels' flex array.\nEach element is of type 'struct ieee80211_channel'.\nSo only 1 element is allocated in this array.\n\nWhen doing:\n  mvm->nvm_data->bands[0].channels = mvm->nvm_data->channels;\nWe point at the first element of the 'channels' flex array.\nSo this is fine.\n\nHowever, when doing:\n  mvm->nvm_data->bands[0].bitrates =\n\t\t\t(void *)((u8 *)mvm->nvm_data->channels + 1);\nbecause of the \"(u8 *)\" cast, we add only 1 to the address of the beginning\nof the flex array.\n\nIt is likely that we want point at the 'struct ieee80211_rate' allocated\njust after.\n\nRemove the spurious casting so that the pointer arithmetic works as\nexpected.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.57",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52531"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7c8faa31080342aec4903c9acb20caf82fcca1ef"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6b3223449c959a8be94a1f042288059e40fcccb0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f06cdd8d4ba5252986f51f80cc30263636397128"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8ba438ef3cacc4808a63ed0ce24d4f0942cfe55d"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}