CVE-2022-49934

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49934
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().

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b Patch
https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7 Patch
https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c Patch
https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255 Patch
https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9 Patch
https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d Patch
https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b Patch
https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
History

14 Nov 2025, 20:24

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
Summary
  • (es) 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->flags tras una comprobación 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 está desreferenciado mediante rcu_dereference(), se debe evitar la aceleración en __ieee80211_scan_completed() asegurándose de que, desde el punto de vista de mac80211, ya no se acceda a él desde una sección crítica de lectura de RCU antes de llamar a cfg80211_scan_done().
References () https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b - () https://git.kernel.org/stable/c/4abc8c07a065ecf771827bde3c63fbbe4aa0c08b - Patch
References () https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7 - () https://git.kernel.org/stable/c/5d20c6f932f2758078d0454729129c894fe353e7 - Patch
References () https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c - () https://git.kernel.org/stable/c/60deb9f10eec5c6a20252ed36238b55d8b614a2c - Patch
References () https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255 - () https://git.kernel.org/stable/c/6eb181a64fdabf10be9e54de728876667da20255 - Patch
References () https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9 - () https://git.kernel.org/stable/c/78a07732fbb0934d14827d8f09b9aa6a49ee1aa9 - Patch
References () https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d - () https://git.kernel.org/stable/c/9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d - Patch
References () https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b - () https://git.kernel.org/stable/c/c0445feb80a4d0854898118fa01073701f8d356b - Patch
References () https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1 - () https://git.kernel.org/stable/c/e0ff39448cea654843744c72c6780293c5082cb1 - Patch
CWE CWE-416
CPE cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-14 20:24

NVD link : CVE-2022-49934

Mitre link : CVE-2022-49934

CVE.ORG link : CVE-2022-49934

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

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