7.8

CVE-2022-49416

wifi: mac80211: fix use-after-free in chanctx code

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.17 < 4.9.318
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.283
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.247
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.198
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.121
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.46
Linux ≫ Linux Kernel Version >= 5.16 < 5.17.14
Linux ≫ Linux Kernel Version >= 5.18 < 5.18.3
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.17
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/265bec4779a38b65e86a25120370f200822dfa76
Patch
https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721e
Patch
https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4
Patch
https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c
Patch
https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331
Patch
https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c
Patch
https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449a
Patch
https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34
Patch
https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79e
Patch