Vulnerability in s390/cio driver for path_event call
Summary
GSD-2022-1000531: s390/cio: verify the driver availability for path_event call. Affects Kernel versions >= 32ef938815c1fb42d65212aac860ab153a64de1a, < a0619027f11590b2070624297530c34dc7f91bcd. No fix is published. How to fix ↓
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Background
The s390/cio driver is a component of the Linux Kernel that provides support for the Channel I/O (CIO) subsystem on IBM System z architectures. It enables communication between the operating system and I/O devices. The driver is responsible for managing path events, which are notifications of changes in the availability or status of I/O paths. These events are crucial for maintaining the reliability and performance of I/O operations on the system.
Vulnerability Detail
The s390/cio driver in the Linux Kernel prior to version 5.16.10 does not properly verify the availability of the driver before making a path_event call. This vulnerability can be exploited by an attacker to trigger a path_event call on a non-existent or unavailable driver, leading to potential system instability or crashes. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability at the moment.
Conclusion
The s390/cio driver in the Linux Kernel is vulnerable to a security issue that can potentially lead to system instability or crashes. It is recommended to update the kernel to version 5.16.10 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The s390/cio driver is a component of the Linux Kernel that provides support for the Channel I/O (CIO) subsystem on IBM System z architectures. It enables communication between the operating system and I/O devices.
Path events are notifications of changes in the availability or status of I/O paths. They are crucial for maintaining the reliability and performance of I/O operations on the system.
The impact of this vulnerability is currently unknown. It may lead to system instability or crashes if an attacker triggers a path_event call on a non-existent or unavailable driver.
To fix this vulnerability, update the Linux Kernel to version 5.16.10 or later, which includes a fix for the issue.
No, there is currently no known workaround for this vulnerability.
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