CVE-2026-68316 accel: ethosu: Fix element size accounting for cmd stream validation
Incorrect element size calculation in the Ethos-U accelerator driver can lead to buffer overflows, potentially allowing attackers to cause denial of service or execute arbitrary code.
- 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-2026-68316?
CVE-2026-68316 is a high-severity vulnerability in Linux, published on 10 Aug 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:
accel: ethosu: Fix element size accounting for cmd stream validation
There are 2 issues with the element size handling in the command stream validation which result in too small of a size calculated when the element size is 16/32/64 bits.
For NHWC format, the element size is simply missing from the calculation.
The bitfield for the element size is different between IFM/IFM2 and OFM. IFM and IFM2 encode the precision in parameter bits 2:3, while OFM uses bits 1:2.
Which versions are affected by CVE-2026-68316?
How do I fix CVE-2026-68316?
Apply the vendor's patch.
Is CVE-2026-68316 being exploited?
There is no known exploitation of CVE-2026-68316 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-68316, GHSA-35p7-3vg5-ccvp, UBUNTU-CVE-2026-68316.