fkie_cve-2022-49934
Vulnerability from fkie_nvd
Published
2025-06-18 11:15
Modified
2025-06-18 13:46
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 |
|---|
{
"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": "2025-06-18T13:46:52.973",
"metrics": {},
"published": "2025-06-18T11:15:19.400",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"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"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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