CVE-2026-98565 net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621
A local attacker with root privileges can cause a kernel crash by unbinding the MT7531 or MT7621 DSA driver due to a NULL pointer dereference.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98565?
CVE-2026-98565 is a vulnerability in Linux, published on 18 Oct 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:
net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621
The core and io supplies are only requested for ID_MT7530: both the devm_regulator_get() in probe and the regulator_enable() in mt7530_setup() are guarded by the switch id, but mt7530_remove() disables them unconditionally. On an MT7621 or an MT7531 both pointers are still NULL from devm_kzalloc(), so rmmod or a sysfs unbind calls regulator_disable() on NULL.
Which versions are affected by CVE-2026-98565?
How do I fix CVE-2026-98565?
Apply the vendor's patch.
Is CVE-2026-98565 being exploited?
There is no known exploitation of CVE-2026-98565 in the wild and no public exploit code.
Sources
Also known as AZL-109307, BELL-CVE-2026-98565, DEBIAN-CVE-2026-98565, GHSA-4r34-63x3-rq2x, UBUNTU-CVE-2026-98565.