Sleeping Function Called from Invalid Context in isdn: mISDN

Kernel Updated 02 Oct 2025

Summary

14/11/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

UVI-2021-1001961: isdn: mISDN: Fix sleeping function called from invalid context. Affects Kernel versions < 37e4f57b22cc5ebb3f80cf0f74fdeb487f082367. No fix is published. How to fix ↓

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Background

The isdn package is a part of the Linux Kernel ecosystem and provides support for Integrated Services Digital Network (ISDN) devices. It allows communication over ISDN lines and handles various protocols and signaling. The mISDN subsystem within the isdn package is responsible for managing ISDN devices and their corresponding drivers.

Vulnerability Detail

The vulnerability identified as UVI-2021-1001961 in the isdn: mISDN subsystem involves a sleeping function being called from an invalid context. This can lead to issues such as deadlocks or crashes in the system. The vulnerability has been fixed in Linux Kernel version v4.14.253 by commit 37e4f57b22cc5ebb3f80cf0f74fdeb487f082367. However, the impact and attack plausibility of this vulnerability have not been proven.

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 isdn: mISDN vulnerability involving a sleeping function called from an invalid context has been identified and fixed in Linux Kernel version v4.14.253. It is recommended to update the Linux Kernel to the latest stable version to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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