fkie_cve-2022-49934
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-11-14 20:24
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.0
linux linux_kernel 6.0
linux linux_kernel 6.0


To clipboard 

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  "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()."
    }
  ],
  "id": "CVE-2022-49934",
  "lastModified": "2025-11-14T20:24:12.867",
  "metrics": {
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-06-18T11:15:19.400",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-416"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}


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