s390/qeth: NULL dereference in qeth_clear_working_pool_list()
Summary
UVI-2021-1001755: s390/qeth: fix NULL deref in qeth_clear_working_pool_list(). Affects Kernel versions >= eff73e16ee116f6eafa2be48fab42659a27cb453, < 9b00fb12cdc9d8d1c3ffe82a78e74738127803fc. No fix is published. How to fix ↓
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Background
The s390/qeth package is a component of the Linux Kernel that provides support for the IBM System z network devices. It includes drivers and utilities for managing and configuring these devices. The qeth_clear_working_pool_list() function is responsible for clearing the working pool list used by the qeth driver. This function is called during the cleanup process of the driver.
Vulnerability Detail
The vulnerability identified as UVI-2021-1001755 is a NULL dereference issue in the qeth_clear_working_pool_list() function. This vulnerability can be triggered when the function is called with a NULL pointer, leading to a crash or potential privilege escalation. An attacker may be able to exploit this vulnerability to execute arbitrary code or cause a denial of service.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability.
Conclusion
The NULL dereference vulnerability in the s390/qeth package's qeth_clear_working_pool_list() function can lead to crashes or potential privilege escalation. It is crucial to update the Linux Kernel to version v5.14.9 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can potentially allow an attacker to execute arbitrary code or cause a denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will provide real-time alerts for open-source vulnerabilities.
Yes, a patch for this vulnerability is available in the Linux Kernel version v5.14.9 or later.
There are no known public exploits for this vulnerability at the time of this report.
You can find more information about this vulnerability in the official Linux Kernel repository and the vulnerability database maintained by the Cloud Security Alliance. The specific vulnerability ID is UVI-2021-1001755.
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