CVE-2026-64170 spi: qup: fix error pointer deref after DMA setup failure
A null pointer dereference in the Linux kernel SPI QUP driver can cause a system crash during device probe or unbind if DMA setup fails.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64170?
CVE-2026-64170 is a medium-severity vulnerability in Linux kernel, published on 19 Jul 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:
spi: qup: fix error pointer deref after DMA setup failure
The driver falls back to PIO mode if DMA setup fails during probe.
Make sure to the clear the DMA channel pointers on setup failure to avoid dereferencing an error pointer (or attempting to release a channel a second time) on later probe errors or driver unbind.
This issue was flagged by Sashiko when reviewing a devres allocation conversion patch.
Weakness: CWE-476
Which versions are affected by CVE-2026-64170?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64170?
Apply the vendor's patch.
Is CVE-2026-64170 being exploited?
There is no known exploitation of CVE-2026-64170 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64170, DEBIAN-CVE-2026-64170, GHSA-m682-4gwr-mr4j, ROOT-OS-UBUNTU-2204-CVE-2026-64170, UBUNTU-CVE-2026-64170.