{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-53321",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2023-53321"
  ],
  "published": "2025-09-16T16:13:45Z",
  "summary": "wifi: mac80211_hwsim: drop short frames",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: drop short frames\n\nWhile technically some control frames like ACK are shorter and\nend after Address 1, such frames shouldn't be forwarded through\nwmediumd or similar userspace, so require the full 3-address\nheader to avoid accessing invalid memory if shorter frames are\npassed in.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
    }
  ],
  "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": "6.1.55",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-53321"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3beb97bed860d95b14ad23578ce8ddaea62023db"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/672205c6f2d11978fcd7f0f336bb2c708e28874b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c64ee9dd335832d5e2ab0a8fc83a34ad4c729799"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b9a175e3b250b0dc6e152988040aa5014e98e61e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/89a41ed7f21476301659ebd25ccb48a60791c1a7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fba360a047d5eeeb9d4b7c3a9b1c8308980ce9a6"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:24:39Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.1,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The bug is reached via the MAC80211_HWSIM generic netlink HWSIM_CMD_FRAME command (sendmsg on a local genetlink socket into hwsim_cloned_frame_received_nl), not via on-air Wi\u2011Fi frames or a remote network protocol; virtio is an alternate local/VM-test path, still not Network/Adjacent.\nAC:L - Once the attacker is the registered wmediumd for a radio (or virtio mode is enabled), they fully control HWSIM_ATTR_FRAME length and can reliably send a frame shorter than sizeof(struct ieee80211_hdr_3addr) with no race or other attacker-uncontrollable condition.\nPR:L - HWSIM_CMD_FRAME itself has no genl capability flag, but injecting frames requires being the registered wmediumd; HWSIM_CMD_REGISTER (and NEW_RADIO) use GENL_UNS_ADMIN_PERM, which is CAP_NET_ADMIN in the caller's user_ns and is obtainable by an unprivileged user via user+net namespaces.\nUI:N - The attacker triggers the path entirely with their own netlink REGISTER/NEW_RADIO and FRAME messages; no separate victim action is required.\nS:U - The invalid read and any resulting fault stay inside the host kernel mac80211_hwsim/mac80211 authority and do not cross a VM, IOMMU, or sandbox boundary on the primary netlink attack path.\nC:H - Short frames cause mac80211_hwsim_rx to read hdr->addr1/addr2 past the copied skb payload into uninitialized/out-of-bounds skb-head heap memory (KMSAN uninit-value), which is an OOB read of kernel memory and scores Confidentiality High under the OOB-read guidance.\nI:N - The defect is a read of uninitialized/past-end frame header bytes only; there is no OOB write, UAF, or other integrity or control-flow corruption primitive, and mac80211 later length-checks before further parsing.\nA:H - Accessing past the valid frame data into invalid skb memory can produce a kernel fault/oops under memory debugging or tight allocations (as reflected by the sanitizer finding that motivated the fix), so Availability is scored High."
    }
  }
}