8.8

CVE-2022-49416: wifi: mac80211: fix use-after-free in chanctx code

Modified
AliasesUBUNTU-CVE-2022-49416DEBIAN-CVE-2022-49416
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49416 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.9% 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
0.34%
0%100%
Low · 0.00 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-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1

Timeline

  1. 26-02-2025
    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 use-after-free in chanctx code In ieee80211_vif_use_reserved_context(), when we have an old context and the new context's replace_state is set to IEEE80211_CHANCTX_REPLACE_NONE, we free the old context in ieee80211_vif_use_reserved_reassign(). Therefore, we cannot check the old_ctx anymore, so we should set it to NULL after this point. However, since the new_ctx replace state is clearly not IEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do anything else in this function and can just return to avoid accessing the freed old_ctx.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.34% 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) | < 4.15.0-192.203 | < 5.4.0-126.142 | < 5.15.0-47.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1140.151 | < 5.4.0-1085.92 | < 5.15.0-1019.23
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 88cc8f963febe192d6ded9df7217f92f380b449a | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4 | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 9f1e5cc85ad77e52f54049a94db0407445ae2a34 | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 265bec4779a38b65e86a25120370f200822dfa76 | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 6118bbdf69f4718b02d26bbcf2e497eb66004331 | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < b79110f2bf6022e60e590d2e094728a8eec3e79e | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c | ≥ 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f, < 2965c4cdf7ad9ce0796fac5e57debb9519ea721e | 3.17
  • linux_kernel≥ 3.17, < 4.9.318 | ≥ 4.10, < 4.14.283 | ≥ 4.15, < 4.19.247 | ≥ 4.20, < 5.4.198 | ≥ 5.5, < 5.10.121 | ≥ 5.11, < 5.15.46 | ≥ 5.16, < 5.17.14 | ≥ 5.18, < 5.18.3
Debian1 product
  • linux< 5.18.5-1

3 vendors · 114 products

References

13 links
Show all 13 references