7.8

CVE-2022-49934

wifi: mac80211: Fix UAF in ieee80211_scan_rx()

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.19 < 4.9.330
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.295
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.260
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.215
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.142
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.66
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.8
Linux ≫ Linux Kernel Version6.0 Updaterc1
Linux ≫ Linux Kernel Version6.0 Updaterc2
Linux ≫ Linux Kernel Version6.0 Updaterc3
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.16% 0.054
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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