Vulnerability in Kernel package: s390/stack
Summary
GSD-2021-1001128: s390/stack: fix possible register corruption with stack switch helper. Affects Kernel versions >= ff340d2472ec7618443913928af9fb85a7009270, < 5fd0c2cf7b11c23aebbbc512cfed08485f0a422a. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system, responsible for managing system resources and providing an interface between hardware and software. The s390/stack module within the Kernel package is specifically designed for stack management on IBM System z architecture. It facilitates efficient context switching between different stacks. However, a vulnerability has been discovered in the stack switch helper function, which could potentially lead to register corruption.
Vulnerability Detail
The vulnerability in the s390/stack module arises from a flaw in the stack switch helper function. It is possible for this function to corrupt registers during stack switching operations. Although the impact and attack plausibility have not been proven, the potential consequences of register corruption can be severe. It may result in system instability, crashes, or even unauthorized access to sensitive information. This vulnerability was introduced in version v4.20 of the Linux Kernel and has been fixed in version v5.10.47.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
The vulnerability in the s390/stack module of the Kernel package can lead to register corruption, potentially causing system instability or unauthorized access to sensitive information. It is crucial to update the Linux Kernel package to version v5.10.47 or later to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from system instability and crashes to potential unauthorized access to sensitive information.
You can use Vulert's playground (https://vulert.com/scanner) to check if your application is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities without requiring access to the code or installation.
No known exploit has been reported for this vulnerability at the moment.
The recommended mitigation is to update the Linux Kernel package to the fixed version v5.10.47 or later.
You can find more details about this vulnerability in the official vulnerability report: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/GSD-2021-1001128.json
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