Vulnerability in s390/cio Package: Verify Driver Availability for path_event Call

Kernel Updated 02 Oct 2025

Summary

27/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000443: s390/cio: verify the driver availability for path_event call. Affects Kernel versions >= 32ef938815c1fb42d65212aac860ab153a64de1a, < fe990b7bf6ac93f1d850d076b8f0e758268aa4ab. No fix is published. How to fix ↓

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Background

The s390/cio package is a component of the Linux Kernel ecosystem. It provides support for the Channel I/O (CIO) subsystem on IBM System z architectures. The CIO subsystem enables communication between the mainframe and I/O devices. It is responsible for managing channel programs, device drivers, and path events. The path_event call is used to notify the kernel about changes in the availability of I/O paths. This vulnerability affects the s390/cio package and its handling of the path_event call.

Vulnerability Detail

The vulnerability arises from a lack of verification of driver availability for the path_event call in the s390/cio package. This oversight could potentially lead to the execution of code by an attacker with elevated privileges. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in version v5.11 of the Linux Kernel and has been fixed in version v5.15.24 by commit fe990b7bf6ac93f1d850d076b8f0e758268aa4ab.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The s390/cio package in the Linux Kernel is vulnerable to a security issue related to the verification of driver availability for the path_event call. To mitigate this vulnerability, it is crucial to update the Linux Kernel to version v5.15.24 or later. For further support on vulnerability remediation, please contact DevNack.com.

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