CVE-2022-49416

Vulnerability overview

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...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 88cc8f963febe192d6ded9df7217f92f380b449a, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 9f1e5cc85ad77e52f54049a94db0407445ae2a34, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 265bec4779a38b65e86a25120370f200822dfa76, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 6118bbdf69f4718b02d26bbcf2e497eb66004331, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < b79110f2bf6022e60e590d2e094728a8eec3e79e, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c, >= 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f < 2965c4cdf7ad9ce0796fac5e57debb9519ea721e, >= 3.17, >= 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

Fixed versions

4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3

Technical data

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416