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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 88cc8f963febe192d6ded9df7217f92f380b449aaffected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4affected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 9f1e5cc85ad77e52f54049a94db0407445ae2a34affected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 265bec4779a38b65e86a25120370f200822dfa76affected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 6118bbdf69f4718b02d26bbcf2e497eb66004331affected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < b79110f2bf6022e60e590d2e094728a8eec3e79eaffected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2caffected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6caffected5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f to < 2965c4cdf7ad9ce0796fac5e57debb9519ea721eaffected
Linux Linux
Default version status: affected
3.17affected0 to < 3.17unaffected4.9.318 to ≤ 4.9.*unaffected4.14.283 to ≤ 4.14.*unaffected4.19.247 to ≤ 4.19.*unaffected5.4.198 to ≤ 5.4.*unaffected5.10.121 to ≤ 5.10.*unaffected5.15.46 to ≤ 5.15.*unaffected5.17.14 to ≤ 5.17.*unaffected5.18.3 to ≤ 5.18.*unaffected5.19 to ≤ *unaffected
References
- 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 ↗