CVE-2026-90377 wifi: mt76: fix RX data queuing of RRO 3.0
A flaw in the Linux kernel mt76 Wi-Fi driver causes RX data stalling and reordering, leading to potential denial of service for wireless connections.
- 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-2026-90377?
CVE-2026-90377 is a denial of service 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 RX data queuing of RRO 3.0
For RRO 3.0, RX data released from a RRO data queue should be put to the indicator queue. The frames are processed and completed in the context of the indicator queue NAPI, which only polls skbs queued on the MT_RXQ_RRO_IND list; frames queued under the data queue id are left sitting on that list until the data queue NAPI happens to run, stalling and reordering RX data.
Which versions are affected by CVE-2026-90377?
How do I fix CVE-2026-90377?
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-2026-90377 being exploited?
There is no known exploitation of CVE-2026-90377 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-90377, DEBIAN-CVE-2026-90377, GHSA-57wf-22jg-j93r, UBUNTU-CVE-2026-90377.