Vulnerability details
CVE-2022-49416
Linux Linux
wifi: mac80211: fix use-after-free in chanctx code
CVSS 3.1
8.8High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.17 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 9f1e5cc85ad77e52f54049a94db0407445ae2a34 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 265bec4779a38b65e86a25120370f200822dfa76 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 6118bbdf69f4718b02d26bbcf2e497eb66004331 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 88cc8f963febe192d6ded9df7217f92f380b449a | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < 2965c4cdf7ad9ce0796fac5e57debb9519ea721e | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f ≤ v < b79110f2bf6022e60e590d2e094728a8eec3e79e | CVEProject cvelistV5 (CNA) |
References and advisories
9- https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449a
- https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4
- https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34
- https://git.kernel.org/stable/c/265bec4779a38b65e86a25120370f200822dfa76
- https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331
- https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79e
- https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c
- https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c
- https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721e
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Details
- Published
- 2025-02-26
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.33%
Probability of exploitation in 30 days
27%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free