8.8

CVE-2022-49934: wifi: mac80211: Fix UAF in ieee80211_scan_rx()

Modified
AliasesUBUNTU-CVE-2022-49934DEBIAN-CVE-2022-49934
Published 18-06-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49934 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 14.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.23%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
RHSA-2023:2458RHSA-2023:2951SUSE-SU-2025:02264-1SUSE-SU-2025:02308-1SUSE-SU-2025:02320-1SUSE-SU-2025:02321-1

Timeline

  1. 18-06-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

Decrease -0.03 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu111 products
  • linuxAll versions (No fix recorded) | < 4.15.0-204.215 | < 5.4.0-136.153 | < 5.15.0-57.63
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1150.163 | < 5.4.0-1093.101 | < 5.15.0-1027.31
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 6eb181a64fdabf10be9e54de728876667da20255 | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < e0ff39448cea654843744c72c6780293c5082cb1 | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 78a07732fbb0934d14827d8f09b9aa6a49ee1aa9 | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 9ad48cbf8b07f10c1e4a7a262b32a9179ae9dd2d | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 4abc8c07a065ecf771827bde3c63fbbe4aa0c08b | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 5d20c6f932f2758078d0454729129c894fe353e7 | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < c0445feb80a4d0854898118fa01073701f8d356b | ≥ 6ea0a69ca21bbddab5b3979c2190013b0263e749, < 60deb9f10eec5c6a20252ed36238b55d8b614a2c | 3.19
  • linux_kernel≥ 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:rc1 | 6.0:rc2 | 6.0:rc3
Debian1 product
  • linux< 5.19.11-1

3 vendors · 114 products

References

12 links
Show all 12 references