CVE-2022-49934

Vulnerability overview

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().

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 6eb181a64fdabf10be9e54de728876667da20255, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < e0ff39448cea654843744c72c6780293c5082cb1, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 78a07732fbb0934d14827d8f09b9aa6a49ee1aa9, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 4abc8c07a065ecf771827bde3c63fbbe4aa0c08b, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 5d20c6f932f2758078d0454729129c894fe353e7, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < c0445feb80a4d0854898118fa01073701f8d356b, >= 6ea0a69ca21bbddab5b3979c2190013b0263e749 < 60deb9f10eec5c6a20252ed36238b55d8b614a2c, >= 3.19, >= 3.19 < 4.9.330, >= 4.10 < 4.14.295, >= 4.15 < 4.19.260, >= 4.20 < 5.4.215, >= 5.5 < 5.10.142, >= 5.11 < 5.15.66, >= 5.16 < 5.19.8, 6.0

Fixed versions

4.9.330, 4.14.295, 4.19.260, 5.4.215, 5.10.142, 5.15.66, 5.19.8

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416