{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52798",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2023-52798"
  ],
  "published": "2024-05-21T15:34:20Z",
  "summary": "wifi: ath11k: fix dfs radar event locking",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix dfs radar event locking\n\nThe ath11k active pdevs are protected by RCU but the DFS radar event\nhandling code calling ath11k_mac_get_ar_by_pdev_id() was not marked as a\nread-side critical section.\n\nMark the code in question as an RCU read-side critical section to avoid\nany potential use-after-free issues.\n\nCompile tested only.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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": "6.1.64",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52798"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f882f51905517575c9f793a3dff567af90ef9a10"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/426e718ce9ba60013364a54233feee309356cb82"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ca420ac4f9451f22347bae44b18ab47ba2c267ec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1fd878e1750190a612b5de2af357cca422ec0822"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/21ebb0aba580d347e12f01ce5f6e75044427b3d5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3b6c14833165f689cc5928574ebafe52bbce5f1e"
    }
  ],
  "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": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The vulnerable path runs only when ath11k firmware delivers WMI_PDEV_DFS_RADAR_DETECTION_EVENTID over CE/HTC into ath11k_wmi_pdev_dfs_radar_detected_event, which is raised by on-channel radar detection; an attacker must be in RF range to inject radar-like pulses against a DFS AP, matching Adjacent for Wi\u2011Fi/RF attacks.\nAC:L - An adjacent attacker can repeatedly spoof radar to fire the event handler at will, and that same DFS reaction drives CAC cancel/channel leave/reconfigure that races with further in-flight WMI events against pdevs_active; the attacker influences both sides of the missing-RCU race, so complexity is Low.\nPR:N - Radar pulses are processed entirely in the firmware-to-host WMI softirq path with no host account, capability, or authentication check; the worst reasonable case is an unauthenticated peer near an ath11k AP already serving a 5 GHz DFS channel.\nUI:N - Once the radio is up with DFS phyerr offload enabled (ath11k_mac_op_start), firmware radar indications are handled automatically with no victim action such as mounting a device or opening a file.\nS:U - The potential use-after-free corrupts ath11k/mac80211 state inside the host kernel authority only and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Missing rcu_read_lock around ath11k_mac_get_ar_by_pdev_id() allows use of RCU-protected pdev/ar state after deactivation/teardown; per guidance, that UAF enables heap reuse and arbitrary kernel disclosure.\nI:H - The same UAF of sprayable ath11k/ieee80211 state while the handler still calls into ieee80211_radar_detected(ar->hw) yields write and control-flow primitives characteristic of exploitable kernel UAFs.\nA:H - Concurrent use of a deactivated or freed ar/hw after synchronize_rcu without a matching read-side critical section can oops/panic the kernel, so availability impact is complete even without full code execution."
    }
  }
}