A vulnerability was found in Linux Kernel up to 6.12.77/6.18.19/6.19.9/7.0-rc4 and classified as critical . This affects the function ieee80211_chan_bw_change of the component AP_VLAN Interface . The manipulation results in null pointer dereference. This vulnerability is known as CVE-2026-31394 . Access to the local network is required for this attack. No exploit is available. It is suggested to upgrade the affected component.