CVE-2025-40339
Description
A NULL pointer dereference flaw was found in the Linux kernel's AMD GPU (amdgpu) driver. In the amdgpu_vm_handle_moved() function, when processing amdgpu_bo_va entries that are part of fpriv->prt_va (partially resident texture virtual address), the associated buffer object (bo) is always NULL. Dereferencing this NULL pointer causes a kernel crash. A local user with access to AMD GPU resources could trigger this condition, resulting in a denial of service.
Statement
This vulnerability affects systems with AMD GPUs using the amdgpu driver. Exploitation requires local access and the ability to interact with AMD GPU virtual memory management. The impact is limited to denial of service through a kernel crash.
Mitigation
To mitigate this issue, prevent the amdgpu module from being loaded if AMD GPU functionality is not required. See https://access.redhat.com/solutions/41278 for instructions on how to blacklist a kernel module.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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