CVE-2026-74322 wifi: mt76: mt7996: Fix possible NULL pointer dereference in mt7996_mac_write_txwi_80211()
A NULL pointer dereference in the mt7996 WiFi driver allows local attackers to cause a system crash via crafted injected frames.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74322?
CVE-2026-74322 is a vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7996: Fix possible NULL pointer dereference in mt7996_mac_write_txwi_80211()
For injected frames (e.g. via radiotap), mac80211 can pass info->control.vif = NULL, as explicitly noted in struct ieee80211_tx_info. Check vif pointer before executing ieee80211_vif_is_mld() in mt7996_mac_write_txwi_80211 routine in order to avoid a possible NULL pointer dereference.
Which versions are affected by CVE-2026-74322?
How do I fix CVE-2026-74322?
Apply the vendor's patch.
Is CVE-2026-74322 being exploited?
There is no known exploitation of CVE-2026-74322 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74322, DEBIAN-CVE-2026-74322, GHSA-xpxx-w558-6w56, UBUNTU-CVE-2026-74322.