Vulnerability in s390/zcrypt: Fix zcard and zqueue Hot-Unplug Memory Leak
Summary
GSD-2021-1000156: 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 occurs during the hot-unplug process of zcards and zqueues. When these components are hot-unplugged, a memory leak can occur, resulting in the consumption of system resources. This can lead to performance degradation and potential denial-of-service conditions. The vulnerability was introduced in version v5.10 of the Linux Kernel 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
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in s390/zcrypt, which caused a memory leak during the hot-unplug process of zcards and zqueues, has been fixed in version v5.10.36 of the Linux Kernel. To mitigate the vulnerability, it is recommended to update the Linux Kernel to this version or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can result in a memory leak during the hot-unplug process of zcards and zqueues in the s390/zcrypt package. This can lead 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 to the playground, and it will analyze the dependencies and alert you if any vulnerabilities are found.
Yes, the vulnerability has been fixed in version v5.10.36 of the Linux Kernel. It is recommended to update to this version or later to mitigate the vulnerability.
No specific workaround has been mentioned for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
You can find more information about this vulnerability in the GSD-2021-1000156.json file available in the GSD database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000156.json).
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