{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53570",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-53570"
  ],
  "published": "2025-10-04T15:17:41Z",
  "summary": "wifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: fix integer overflow in nl80211_parse_mbssid_elems()\n\nnl80211_parse_mbssid_elems() uses a u8 variable num_elems to count the\nnumber of MBSSID elements in the nested netlink attribute attrs, which can\nlead to an integer overflow if a user of the nl80211 interface specifies\n256 or more elements in the corresponding attribute in userspace. The\ninteger overflow can lead to a heap buffer overflow as num_elems determines\nthe size of the trailing array in elems, and this array is thereafter\nwritten to for each element in attrs.\n\nNote that this vulnerability only affects devices with the\nwiphy->mbssid_max_interfaces member set for the wireless physical device\nstruct in the device driver, and can only be triggered by a process with\nCAP_NET_ADMIN capabilities.\n\nFix this by checking for a maximum of 255 elements in attrs.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.21-1+rpt1"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v6",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l",
            "binary_version": "1:6.1.21-1+rpt1"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi1-rpi-v8",
            "binary_version": "1:6.1.21-1+rpt1"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.21-1+rpt1": {
            "linux_commit": "0afb5e98488aed7017b9bf321b575d0177feb7ed",
            "upstream_version": "6.1.21",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.46"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53570"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e642eb67b8c10dcce758d549cc81564116e0fa49"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7d09f9f255a5f78578deba5454923072bb53b16c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6311071a056272e1e761de8d0305e87cc566f734"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:24:39Z"
  }
}