CVE-2022-49934

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mac80211: Fix UAF in ieee80211_scan_rx()<br /> <br /> ieee80211_scan_rx() tries to access scan_req-&gt;flags after a<br /> null check, but a UAF is observed when the scan is completed<br /> and __ieee80211_scan_completed() executes, which then calls<br /> cfg80211_scan_done() leading to the freeing of scan_req.<br /> <br /> Since scan_req is rcu_dereference()&amp;#39;d, prevent the racing in<br /> __ieee80211_scan_completed() by ensuring that from mac80211&amp;#39;s<br /> POV it is no longer accessed from an RCU read critical section<br /> before we call cfg80211_scan_done().