CVE-2026-74323 wifi: mt76: mt7996: Fix possible token leak in mt7996_tx_prepare_skb()
A token leak in the mt7996 WiFi driver can lead to resource exhaustion and denial of service when link lookups fail.
- 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-2026-74323?
CVE-2026-74323 is a high-severity denial of service 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 token leak in mt7996_tx_prepare_skb()
If link_conf or link_sta lookup fails in mt7996_tx_prepare_skb routine, mt7996 driver leaks an already allocated tx token. Fix the issue releasing the token in case of error.
Which versions are affected by CVE-2026-74323?
How do I fix CVE-2026-74323?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-74323 being exploited?
There is no known exploitation of CVE-2026-74323 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74323, DEBIAN-CVE-2026-74323, GHSA-34gf-qwwx-pv6w, UBUNTU-CVE-2026-74323.