CVE-2022-49934 (GCVE-0-2022-49934)
Vulnerability from cvelistv5
Published
2025-06-18 10:54
Modified
2025-07-15 15:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: Fix UAF in ieee80211_scan_rx() ieee80211_scan_rx() tries to access scan_req->flags after a null check, but a UAF is observed when the scan is completed and __ieee80211_scan_completed() executes, which then calls cfg80211_scan_done() leading to the freeing of scan_req. Since scan_req is rcu_dereference()'d, prevent the racing in __ieee80211_scan_completed() by ensuring that from mac80211's POV it is no longer accessed from an RCU read critical section before we call cfg80211_scan_done().
References
Impacted products
Vendor Product Version
Linux Linux Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
Version: 6ea0a69ca21bbddab5b3979c2190013b0263e749
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/scan.c"
          ],
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            }
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix UAF in ieee80211_scan_rx()\n\nieee80211_scan_rx() tries to access scan_req-\u003eflags after a\nnull check, but a UAF is observed when the scan is completed\nand __ieee80211_scan_completed() executes, which then calls\ncfg80211_scan_done() leading to the freeing of scan_req.\n\nSince scan_req is rcu_dereference()\u0027d, prevent the racing in\n__ieee80211_scan_completed() by ensuring that from mac80211\u0027s\nPOV it is no longer accessed from an RCU read critical section\nbefore we call cfg80211_scan_done()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-15T15:43:39.598Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255"
        },
        {
          "url": "https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b"
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          "url": "https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b"
        },
        {
          "url": "https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c"
        }
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      "title": "wifi: mac80211: Fix UAF in ieee80211_scan_rx()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49934",
    "datePublished": "2025-06-18T10:54:36.161Z",
    "dateReserved": "2025-05-01T14:05:17.254Z",
    "dateUpdated": "2025-07-15T15:43:39.598Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49934\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:19.400\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: mac80211: Fix UAF in ieee80211_scan_rx()\\n\\nieee80211_scan_rx() tries to access scan_req-\u003eflags after a\\nnull check, but a UAF is observed when the scan is completed\\nand __ieee80211_scan_completed() executes, which then calls\\ncfg80211_scan_done() leading to the freeing of scan_req.\\n\\nSince scan_req is rcu_dereference()\u0027d, prevent the racing in\\n__ieee80211_scan_completed() by ensuring that from mac80211\u0027s\\nPOV it is no longer accessed from an RCU read critical section\\nbefore we call cfg80211_scan_done().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: mac80211: Se ha corregido el UAF en ieee80211_scan_rx(). ieee80211_scan_rx() intenta acceder a scan_req-\u0026gt;flags tras una comprobaci\u00f3n nula, pero se observa un UAF al finalizar el escaneo y se ejecuta __ieee80211_scan_completed(), que a su vez llama a cfg80211_scan_done(), lo que libera scan_req. Dado que scan_req est\u00e1 desreferenciado mediante rcu_dereference(), se debe evitar la aceleraci\u00f3n en __ieee80211_scan_completed() asegur\u00e1ndose de que, desde el punto de vista de mac80211, ya no se acceda a \u00e9l desde una secci\u00f3n cr\u00edtica de lectura de RCU antes de llamar a cfg80211_scan_done().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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