Missing Discipline Function Vulnerability in s390/dasd Kernel Package

Kernel Updated 02 Oct 2025

Summary

04/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000568: s390/dasd: add missing discipline function. Affects Kernel versions >= b72949328869dfd45f6452c2410647afd7db5f1a, < a16be88a3d7e5efcb59a15edea87a8bd369630c6. No fix is published. How to fix ↓

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Background

The s390/dasd package is a component of the Linux Kernel that provides support for Direct Access Storage Devices (DASD) on IBM System z mainframes. DASD devices are used for persistent storage and are critical for the functioning of mainframe systems. The s390/dasd package includes various functions and drivers to enable communication with DASD devices and manage their operations.

Vulnerability Detail

The missing discipline function vulnerability in the s390/dasd package allows an attacker to exploit a flaw in the code that handles DASD devices. This vulnerability was introduced in version v5.11 of the Linux Kernel and was fixed in version v5.12.9. The missing discipline function can lead to undefined behavior and potential security risks. Although the impact and attack plausibility have not been proven, it is important to address this vulnerability to ensure the integrity and security of DASD operations on IBM System z mainframes.

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 missing discipline function vulnerability in the s390/dasd package of the Linux Kernel can potentially lead to security risks and undefined behavior in the handling of DASD devices. It is recommended to update the Kernel to version v5.12.9 or later to address this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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