# CVE-2026-43398: drm/amdgpu: add upper bound check on user inputs in wait ioctl

CVE-2026-43398 is fixed in linux on 1 platform by DEBIAN-CVE-2026-43398 (version 6.19.10-1), released May 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-43398
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0013
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 8, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43398

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/amdgpu: add upper bound check on user inputs in wait ioctl  Huge input values in amdgpu_userq_wait_ioctl can lead to a OOM and could be exploited.  So check these input value against AMDGPU_USERQ_MAX_HANDLES which is big enough value for genuine use cases and could potentially avoid OOM.  v2: squash in Srini's fix  (cherry picked from commit fcec012c664247531aed3e662f4280ff804d1476)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.10-1 | [DEBIAN-CVE-2026-43398](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43398.md) | May 15, 2026 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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