Critical Vulnerability in Linux Kernel: CP Interrupt Bug Leading to Garbage Exception Codes
Summary
DEBIAN-CVE-2024-36951: In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: range check cp bad op exception interrupts Due to a CP interrupt bug, bad packet garbage exception codes are raised. Affects linux versions < 6.8.11-1. Fixed in 6.8.11-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to applications. It is widely used in various environments, from servers to embedded systems. This vulnerability affects the Linux kernel versions in Debian 13 and 14, specifically in the drm/amdkfd module, which is responsible for managing GPU resources and interactions.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the drm/amdkfd module that arises from a bug in the CP interrupt handling. This bug causes the system to raise bad packet garbage exception codes, which can lead to incorrect behavior in the debugger and runtime environments. The lack of proper range checks allows these garbage codes to propagate, potentially leading to system instability or security issues.
How To Fix
Minimum fixed version
6.8.11-1
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, there are no specific workarounds provided for this vulnerability. The best course of action is to apply the patch by updating the kernel to the fixed version.
Conclusion
The identified vulnerability in the Linux kernel's drm/amdkfd module poses significant risks due to improper handling of CP interrupts. Users are strongly advised to update to the patched version 6.8.11-1 to ensure system stability and security.
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FAQ
The vulnerability is a bug in the CP interrupt handling of the Linux kernel that leads to the generation of garbage exception codes.
The affected versions are those prior to 6.8.11-1 in Debian 13 and 14.
The risks include system instability and incorrect behavior in applications that rely on the kernel for managing GPU resources.
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.
Currently, there are no known workarounds. The recommended action is to update to the patched version.
References
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