CVE-2026-90371 wifi: mt76: fix RXDMAD_C buffer recycling race
A race condition in the Linux kernel mt76 WiFi driver allows attackers to cause a denial of service via buffer recycling conflicts.
- 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-2026-90371?
CVE-2026-90371 is a high-severity vulnerability in Linux, published on 17 Sep 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: fix RXDMAD_C buffer recycling race
The RXDMAD_C buffers come from the RRO data queues' page pools, which are bound to a different NAPI, so the direct page-pool recycle used here could race the owning NAPI; take the non-direct path as is already done for WED RX queues.
Which versions are affected by CVE-2026-90371?
How do I fix CVE-2026-90371?
Apply the vendor's patch.
Is CVE-2026-90371 being exploited?
There is no known exploitation of CVE-2026-90371 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-90371, DEBIAN-CVE-2026-90371, GHSA-hm23-4fh6-jvgr, UBUNTU-CVE-2026-90371.