CVE-2026-53171 accel/ethosu: fix arithmetic issues in dma_length()
Integer overflows in the Ethos-U accelerator driver allow bypassing bounds checks, potentially leading to privilege escalation or code execution.
- 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-2026-53171?
CVE-2026-53171 is a high-severity vulnerability in Linux kernel, published on 25 Jun 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 arithmetic issues in dma_length()
dma_length() derives DMA region usage from command stream values and updates region_size[]:
len = ((len + stride[0]) * size0 + stride[1]) * size1 region_size[region] = max(..., len + dma->offset)
Several arithmetic issues can corrupt the derived region size:
- signed stride values may underflow when added to len - intermediate multiplications may overflow - len + dma->offset may overflow during region_size updates - dma_length() error returns were not validated by the caller
region_size[] is later used by ethosu_job.c to validate command stream accesses against GEM buffer sizes. Arithmetic wraparound can therefore under-report region usage and bypass the bounds validation.
Fix by validating signed additions, using overflow helpers for multiplications and offset updates, and propagating dma_length() failures to the caller.
Which versions are affected by CVE-2026-53171?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53171?
Apply the vendor's patch.
Is CVE-2026-53171 being exploited?
There is no known exploitation of CVE-2026-53171 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-53171, GHSA-vp3v-wxjh-fcp5, UBUNTU-CVE-2026-53171.