CVE-2025-40334: drm/amdgpu: validate userq buffer virtual address and size
CVE-2025-40334 is a vulnerability in drm/amdgpu: validate userq buffer virtual address and size, rated Moderate by Microsoft, with a CVSS 3.1 base score of 5.5 (Medium). An attacker can exploit it by an attacker with local access, with low privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.17% probability of exploitation activity in the next 30 days, higher than 6% of all scored vulnerabilities. Microsoft published it on 10 December 2025, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).
Key facts
- CVE ID
- CVE-2025-40334
- Severity
- Medium CVSS 5.5
- Microsoft severity
- Moderate
- Exploited in the wild
- No
- Publicly disclosed
- No
- EPSS
- 0.17% (percentile 6%)
- CISA KEV
- Not listed
- Released
- Last updated
- Patch Tuesday
- December 2025 Patch Tuesday
- Product families
- Open Source Software
CVSS score and vector
Microsoft scores CVE-2025-40334 at 5.5 (temporal 5.1) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U
| Metric | Value |
|---|---|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | None |
| Integrity impact | None |
| Availability impact | High |
| Exploit code maturity | Unproven |
NVD scores it 7.3 (HIGH) with CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H.
Affected products (1)
Open Source Software
| Product | Security update | Type | Fixed build | Restart |
|---|---|---|---|---|
| azl3 kernel 6.6.117.1-1 on Azure Linux 3.0 |
NIST NVD data
- NVD status
- Deferred
- NVD CVSS
- 7.3 (HIGH)
- Published to NVD
- NVD last modified
References
Revision history
| Version | Date | Description |
|---|---|---|
| 1.0 | Information published. | |
| 2.0 | Information published. |