CVE-2026-80694 net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
A null pointer dereference in the MediaTek Ethernet driver causes a kernel crash when polling is enabled, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80694?
CVE-2026-80694 is a critical vulnerability in Linux, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: mtk_eth_soc: pass eth to mtk_handle_irq_rx in poll_controller
mtk_handle_irq_rx expects a struct mtk_eth * (matching the request_irq cookie), but mtk_poll_controller incorrectly passed the net_device *. Calling ndo_poll_controller with CONFIG_NET_POLL_CONTROLLER enabled would then crash.
Which versions are affected by CVE-2026-80694?
How do I fix CVE-2026-80694?
Apply the vendor's patch.
Is CVE-2026-80694 being exploited?
There is no known exploitation of CVE-2026-80694 in the wild and no public exploit code.
Sources
Also known as AZL-98066, BELL-CVE-2026-80694, DEBIAN-CVE-2026-80694, GHSA-55j9-p2qj-gvrc, UBUNTU-CVE-2026-80694.