Race Condition Vulnerability in zsmalloc Package
Summary
GSD-2022-1003930: zsmalloc: fix races between asynchronous zspage free and page migration. Affects Kernel versions >= 77ff465799c60294e248000cd22ae8171da3304c, < 645996efc2ae391246d595832aaa6f9d3cc338c7. No fix is published. How to fix ↓
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Background
The zsmalloc package is a component of the Linux Kernel that provides a scalable memory allocator for compressed pages. It is designed to improve memory utilization and performance in systems with high memory pressure. The package achieves this by compressing memory pages and storing them in a compressed cache. When a compressed page is needed, it can be decompressed and used. However, a race condition vulnerability has been discovered in the zsmalloc package, which could lead to potential security issues.
Vulnerability Detail
The race condition vulnerability in the zsmalloc package occurs due to a lack of proper synchronization between asynchronous zspage free and page migration operations. This vulnerability can be exploited by an attacker to manipulate the state of zsmalloc pages, potentially leading to memory corruption or other security issues. The vulnerability was introduced in version v4.14 of the Linux Kernel and has been fixed in version v4.19.246 by commit 645996efc2ae391246d595832aaa6f9d3cc338c7.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to update the Linux Kernel to the fixed version to mitigate the risk.
Conclusion
The race condition vulnerability in the zsmalloc package can have serious security implications, including memory corruption. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
zsmalloc is a memory allocator in the Linux Kernel that compresses memory pages to improve memory utilization and performance.
The race condition vulnerability in zsmalloc can lead to memory corruption or other security issues.
To fix this vulnerability, update the Linux Kernel to version v4.19.246 or later.
No, there is no known workaround for this vulnerability. Updating the Linux Kernel is the recommended solution.
This vulnerability was discovered through security analysis and testing of the zsmalloc package.
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