CVE-2026-90428 iommu/tegra241-cmdqv: Don't run the error ISR before probe sets up vintfs
A race condition in the Tegra241 CMDQV driver causes a null pointer dereference during early interrupt handling, leading to a kernel crash.
- 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-2026-90428?
CVE-2026-90428 is a 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:
iommu/tegra241-cmdqv: Don't run the error ISR before probe sets up vintfs
__tegra241_cmdqv_probe() requests the error IRQ before it has allocated the cmdqv->vintfs array and set cmdqv->num_vintfs. A CMDQV left enabled with a latched error across a kexec fires the IRQ as soon as it is requested, and tegra241_cmdqv_isr() then walks the uninitialized cmdqv->vintfs array.
Request the IRQ only after cmdqv->vintfs is allocated and zeroed, so that a latched interrupt firing early runs the ISR against a valid array of NULL slots that it safely skips.
Which versions are affected by CVE-2026-90428?
How do I fix CVE-2026-90428?
Apply the vendor's patch.
Is CVE-2026-90428 being exploited?
There is no known exploitation of CVE-2026-90428 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-90428, DEBIAN-CVE-2026-90428, GHSA-gjw5-xf6c-mcgq, UBUNTU-CVE-2026-90428.