Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-49934

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
18/06/2025
Last modified:
14/11/2025

Description

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().

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 3.19 (including) 4.9.330 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.10 (including) 4.14.295 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.15 (including) 4.19.260 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.20 (including) 5.4.215 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.142 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.66 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.19.8 (excluding)
cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools