# CVE-2026-20731: firmware-nonfree: Improper buffer restrictions for the Intel(R) NPU Driver for all versions within Ring 3: User Applications may allow...

CVE-2026-20731 is fixed in firmware-nonfree on 1 platform by DEBIAN-CVE-2026-20731 (version 20260410-1), released August 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-20731
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 11, 2026

## Description

Improper buffer restrictions for the Intel(R) NPU Driver for all versions within Ring 3: User Applications may allow a denial of service. Unprivileged software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | firmware-nonfree Debian 14 | 20260410-1 | [DEBIAN-CVE-2026-20731](https://patchblox.com/security/data/fix/linux/debian-cve-2026-20731.md) | Aug 16, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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