CVE-2022-49934

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 6eb181a64fdabf10be9e54de728876667da20255affected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < e0ff39448cea654843744c72c6780293c5082cb1affected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 78a07732fbb0934d14827d8f09b9aa6a49ee1aa9affected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2daffected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 4abc8c07a065ecf771827bde3c63fbbe4aa0c08baffected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 5d20c6f932f2758078d0454729129c894fe353e7affected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < c0445feb80a4d0854898118fa01073701f8d356baffected
LinuxLinux6ea0a69ca21bbddab5b3979c2190013b0263e749 < 60deb9f10eec5c6a20252ed36238b55d8b614a2caffected
LinuxLinux3.19affected
LinuxLinux0 < 3.19unaffected
LinuxLinux4.9.330 <= 4.9.*unaffected
LinuxLinux4.14.295 <= 4.14.*unaffected
LinuxLinux4.19.260 <= 4.19.*unaffected
LinuxLinux5.4.215 <= 5.4.*unaffected
LinuxLinux5.10.142 <= 5.10.*unaffected
LinuxLinux5.15.66 <= 5.15.*unaffected
LinuxLinux5.19.8 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

References