# CVE-2026-53171: linux: In the Linux kernel, the following vulnerability has been resolved:  accel/ethosu: fix arithmetic issues in dma_lengt...

CVE-2026-53171 is fixed in linux on 1 platform by DEBIAN-CVE-2026-53171 (version 7.0.13-1), released June 28, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-53171
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 25, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.0.13-1 | [DEBIAN-CVE-2026-53171](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53171.md) | Jun 28, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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