CVE-2022-49934

wifi: mac80211: Fix UAF in ieee80211_scan_rx()

Description

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().

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

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

Frequently Asked Questions

What is the severity of CVE-2022-49934?: CVE-2022-49934 has not yet been assigned a CVSS score.
How to fix CVE-2022-49934?: To fix CVE-2022-49934, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49934 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49934 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49934?: CVE-2022-49934 affects Linux Linux, Linux Linux.

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