Vulnerability in s390/zcrypt: Fix zcard and zqueue Hot-Unplug Memory Leak
Summary
GSD-2021-1000160: s390/zcrypt: fix zcard and zqueue hot-unplug memleak. Affects Kernel versions >= 29c2680fd2bf3862ff5cf2957f198512493156f9, < 026499a9c2e002e621ad568d1378324ae97e5524. No fix is published. How to fix ↓
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Background
The s390/zcrypt package is a component of the Linux Kernel that provides cryptographic support for IBM System z hardware. It includes drivers and interfaces for managing cryptographic cards (zcards) and cryptographic queues (zqueues). These components are responsible for offloading cryptographic operations to dedicated hardware, improving performance and security. However, a vulnerability has been discovered in the hot-unplug process of zcards and zqueues, leading to a memory leak.
Vulnerability Detail
The vulnerability in s390/zcrypt affects the hot-unplug functionality of zcards and zqueues. When a zcard or zqueue is hot-unplugged, a memory leak occurs, resulting in the consumption of system resources. This can lead to performance degradation and potential denial-of-service conditions. The vulnerability was introduced in Linux Kernel version v5.10 by commit 29c2680fd2bf3862ff5cf2957f198512493156f9 and has been fixed in version v5.10.36 by commit 026499a9c2e002e621ad568d1378324ae97e5524.
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 necessary to apply the fix by updating the Linux Kernel.
Conclusion
The vulnerability in s390/zcrypt's hot-unplug process for zcards and zqueues can lead to a memory leak, causing performance degradation and potential denial-of-service conditions. It is crucial to update the Linux Kernel to version v5.10.36 or later to mitigate this vulnerability. For further assistance, please reach out to DevNack.com.
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FAQ
The vulnerability can result in a memory leak, leading to performance degradation and potential denial-of-service conditions.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
No, this vulnerability requires local access to the system in order to hot-unplug zcards or zqueues.
There are no known instances of this vulnerability being exploited in the wild.
For further support on vulnerability remediation, you can contact info@devnack.com.
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