Memory Leak Vulnerability in x86/MCE/AMD Kernel
Summary
GSD-2022-1003172: x86/MCE/AMD: Fix memory leak when threshold_create_bank() fails. Affects Kernel versions >= 6458de97fc15530b54477c4e2b70af653e8ac3d9, < 9708f1956eeb70c86943e0bc62fa3b0101b59616. No fix is published. How to fix ↓
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Background
The x86/MCE/AMD kernel is a component of the Linux operating system that handles machine check exceptions (MCE) on x86-based systems with AMD processors. MCEs are hardware errors detected by the processor and reported to the operating system. The kernel provides functionality to handle and process these errors. However, a vulnerability has been discovered in the kernel that can lead to a memory leak when the threshold_create_bank() function fails. This vulnerability was introduced in version v5.8 of the Linux kernel and has been fixed in version v5.17.14.
Vulnerability Detail
The vulnerability in the x86/MCE/AMD kernel occurs when the threshold_create_bank() function fails. When this happens, a memory leak occurs, which can lead to resource exhaustion and potential denial-of-service attacks. An attacker could exploit this vulnerability by triggering the failure of the threshold_create_bank() function, causing the memory leak to occur. The impact of this vulnerability depends on the specific system configuration and the availability of resources. It is important to note that the actual impact and attack plausibility have not yet been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability. The recommended solution is to update the Linux kernel to the fixed version.
Conclusion
The memory leak vulnerability in the x86/MCE/AMD kernel can lead to resource exhaustion and potential denial-of-service attacks. It is recommended to update the Linux kernel to version v5.17.14 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The x86/MCE/AMD kernel is a component of the Linux operating system that handles machine check exceptions (MCE) on x86-based systems with AMD processors.
The impact of this vulnerability depends on the specific system configuration and the availability of resources. It can potentially lead to resource exhaustion and denial-of-service attacks.
An attacker can exploit this vulnerability by triggering the failure of the threshold_create_bank() function, causing a memory leak to occur.
No, the actual impact and attack plausibility have not yet been proven.
To fix this vulnerability, update the Linux kernel to version v5.17.14 or later.
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