Critical Vulnerability in Linux Kernel: Uninitialized Value in AMDGPU Driver
Summary
DEBIAN-CVE-2025-21987: 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 reg... Affects linux versions < 6.12.19-1. Fixed in 6.12.19-1. How to fix ↓
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Background
The Linux kernel is a core component of the operating system that manages hardware and system resources. It provides essential services for all other parts of the operating system and is crucial for system stability and performance. The kernel supports various hardware architectures and is continuously updated to improve functionality and security. This vulnerability affects the AMDGPU driver, which is responsible for managing AMD graphics cards, and can lead to potential system instability if not addressed.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the AMDGPU driver related to the initialization of return values in the amdgpu_ttm_clear_buffer function. If the amdgpu_res_cleared function returns true for all regions, an uninitialized value may be returned, leading to unpredictable behavior or system crashes. This vulnerability is significant as it can compromise system stability and potentially expose sensitive information.
How To Fix
Minimum fixed version
6.12.19-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, no specific workarounds have been provided for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate any risks associated with the uninitialized value.
Conclusion
The identified vulnerability in the Linux kernel's AMDGPU driver poses a significant risk to system stability and security. It is essential for users to update their kernel to the patched version 6.12.19-1 to mitigate these risks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system integrity.
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FAQ
The vulnerability can lead to system instability and unpredictable behavior, potentially exposing sensitive information.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
Yes, the patched version of the Linux kernel is 6.12.19-1. Users should update to this version to resolve the vulnerability.
While no specific workarounds are available, it is crucial to prioritize updating your kernel to mitigate risks associated with this vulnerability.
Detailed information can be found in the official Debian CVE database at https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21987.json.
References
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