CVE-2026-31768 iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()
A Linux kernel driver bug used stack memory for DMA operations, potentially causing system instability or crashes in ADC devices.
- 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-2026-31768?
CVE-2026-31768 is a high-severity vulnerability in Linux kernel, published on 1 May 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:
iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()
Add a DMA-safe buffer and use it for spi_read() instead of a stack memory. All SPI buffers must be DMA-safe.
Since we only need up to 3 bytes, we just use a u8[] instead of __be16 and __be32 and change the conversion functions appropriately.
Which versions are affected by CVE-2026-31768?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-31768?
Apply the vendor's patch.
Is CVE-2026-31768 being exploited?
There is no known exploitation of CVE-2026-31768 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-31768, DEBIAN-CVE-2026-31768, GHSA-g7rp-hwhp-qxc9, ROOT-OS-DEBIAN-11-CVE-2026-31768, ROOT-OS-UBUNTU-2204-CVE-2026-31768, ROOT-OS-UBUNTU-2404-CVE-2026-31768 and 1 more.