In the Linux kernel, the following vulnerability has been resolved:

wifi: iwlwifi: mvm: avoid NULL pointer dereference

iwl_mvm_tx_skb_sta() and iwl_mvm_tx_mpdu() verify that the mvmvsta
pointer is not NULL.
It retrieves this pointer using iwl_mvm_sta_from_mac80211, which is
dereferencing the ieee80211_sta pointer.
If sta is NULL, iwl_mvm_sta_from_mac80211 will dereference a NULL
pointer.
Fix this by checking the sta pointer before retrieving the mvmsta
from it. If sta is not NULL, then mvmsta isn't either.

kernel.org https://git.kernel.org/stable/c/557a6cd847645e667f3b362560bd7e7c09aac284 [No types assigned]

kernel.org https://git.kernel.org/stable/c/6dcadb2ed3b76623ab96e3e7fbeda1a374d01c28 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c0b4f5d94934c290479180868a32c15ba36a6d9e [No types assigned]

kernel.org https://git.kernel.org/stable/c/cdbf51bfa4b0411820806777da36d93d49bc49a1 [No types assigned]