Race Condition Vulnerability in Linux Kernel's AMD Display Driver
Summary
DEBIAN-CVE-2024-36024: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Disable idle reallow as part of command/gpint execution [Why] Workaroud for a race condition where DMCUB is in the process of committin... Affects linux versions < 6.8.9-1. Fixed in 6.8.9-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, including Debian. It manages hardware resources and provides essential services for software applications. The kernel is known for its robustness and flexibility, supporting a wide range of hardware architectures. However, vulnerabilities can arise, such as the one affecting the AMD display driver, which can lead to hardware hangs and system instability.
Vulnerability Detail
The vulnerability identified as DEBIAN-CVE-2024-36024 is a race condition in the AMD display driver within the Linux kernel. This issue occurs during the handshake process when the DMCUB is committing to IPS1, potentially causing a missed transition into IPS2. This mismanagement can lead to the INBOX1 RPTR being accessed incorrectly, resulting in a hardware hang. The vulnerability poses risks to system stability and performance, particularly in environments relying on AMD graphics.
How To Fix
Minimum fixed version
6.8.9-1
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
As a workaround, it is recommended to disable the idle reallow feature as part of command/gpint execution to create a sufficient gap between entry and exit, preventing back-to-back wake_and_executes that could trigger the race condition.
Conclusion
The DEBIAN-CVE-2024-36024 vulnerability in the Linux kernel's AMD display driver poses a significant risk to system stability. Users are advised to update to the patched version 6.8.9-1 to mitigate this issue. Additionally, a workaround is available to temporarily alleviate the problem until the update can be applied.
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FAQ
It is a vulnerability in the Linux kernel's AMD display driver that can cause hardware hangs due to a race condition.
This vulnerability can lead to system instability and performance issues, particularly for systems using AMD graphics.
You should update your Linux package to the fixed version 6.8.9-1 to mitigate the risk associated with this vulnerability.
Yes, disabling the idle reallow feature during command/gpint execution can serve as a temporary workaround.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using a manifest file like package-lock.json. You can check your application for vulnerabilities using the Vulert playground without signup.
References
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