{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-46166",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-46166"
  ],
  "published": "2026-05-28T09:36:53Z",
  "summary": "wifi: mac80211: use safe list iteration in radar detect work",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: use safe list iteration in radar detect work\n\nThe call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to\nbe freed and removed from the list. Guard against this to avoid a\nslab-use-after-free error.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46166"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/887ece6c23b49d02a6678e7a8d5ad213d75883ce"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7577a4b8a10fab45a6ee2045ea038a5adadbb585"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/120149fb3ebcf674832ca3cafd32bedcdb686dde"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ac8eb3e18f41e2cc8492cc1d358bcb786c850270"
    }
  ],
  "database_specific": {
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    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The vulnerable work is triggered by a PHY-level DFS radar detection event, reachable over-the-air within WiFi radio range; an adjacent attacker can spoof radar pulse waveforms to drive the affected AP into this path, consistent with WiFi being scored Adjacent.\nAC:L - The attacker controls the radar trigger and can repeatedly force CAC restarts on an MLO/split-phy DFS AP to reach the vulnerable iteration; per the higher-severity rule the configuration/timing dependence is treated as Low.\nPR:N - Radar detection is processed below the association layer, so the adjacent RF attacker needs no credentials or authentication on the target.\nUI:N - No victim action is required; the AP only needs to be in its normal operating state on a DFS channel performing CAC.\nS:U - The use-after-free is confined to the kernel's own memory and security authority with no crossing of a trust boundary.\nC:H - A use-after-free of the freed chanctx allows the corrupted/reallocated object's contents (e.g., the list next pointer) to be read and traversed, enabling potential information disclosure.\nI:H - The use-after-free can be leveraged via heap reallocation of the freed chanctx to corrupt subsequent list traversal and structure fields, providing a path to memory corruption/control-flow influence.\nA:H - The slab-use-after-free reliably causes kernel oops/panic when the freed chanctx is dereferenced during continued list iteration."
    }
  }
}