Linux Kernel up to 6.12.17/6.13.5 AMD GPU amdgpu_ttm_clear_buffer uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.12.17/6.13.5. The impacted element is the function amdgpu_ttm_clear_buffer of the component AMD GPU. Such manipulation leads to uninitialized pointer. This vulnerability is uniquely identified as CVE-2025-21987. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.12.17/6.13.5. It has been rated as problematic. Affected by this issue is the function amdgpu_ttm_clear_buffer of the component AMD GPU. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. Using CWE to declare the problem leads to CWE-824. The product accesses or uses a pointer that has not been initialized. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: init return value in amdgpu_ttm_clear_buffer Otherwise an uninitialized value can be returned if amdgpu_res_cleared returns true for all regions. Possibly closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3812 (cherry picked from commit 7c62aacc3b452f73a1284198c81551035fac6d71)

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2025-21987 since 12/29/2024. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 236983 (Ubuntu 24.04 LTS / 24.10 : Linux kernel vulnerabilities (USN-7521-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.18 or 6.13.6 eliminates this vulnerability. Applying the patch d2c9625b0ade41f9917875d88173a0cc802b95fc/5bd98c2df4a0f2e2dcbdf563feb8d348406377b5/d3c7059b6a8600fc62cd863f1ea203b8675e63e1 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (236983) and CERT Bund (WID-SEC-2025-0698). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • SolarWinds Security Event Manager
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236983
Nessus Name: Ubuntu 24.04 LTS / 24.10 : Linux kernel vulnerabilities (USN-7521-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.12.18/6.13.6
Patch: d2c9625b0ade41f9917875d88173a0cc802b95fc/5bd98c2df4a0f2e2dcbdf563feb8d348406377b5/d3c7059b6a8600fc62cd863f1ea203b8675e63e1

Timelineinfo

12/29/2024 🔍
04/02/2025 +93 days 🔍
04/02/2025 +0 days 🔍
02/16/2026 +320 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21987 (🔍)
GCVE (CVE): GCVE-0-2025-21987
GCVE (VulDB): GCVE-100-303002
CERT Bund: WID-SEC-2025-0698 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/02/2025 15:28
Updated: 02/16/2026 17:51
Changes: 04/02/2025 15:28 (58), 05/20/2025 22:34 (2), 07/19/2025 23:11 (7), 10/31/2025 02:12 (11), 02/16/2026 17:51 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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