Sleeping Function Called from Invalid Context in isdn: mISDN

Kernel Updated 02 Oct 2025

Summary

28/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001837: isdn: mISDN: Fix sleeping function called from invalid context. Affects Kernel versions < 9f591cbdbed3d7822b2bdba89b34a6d7b434317d. 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 ISDN (Integrated Services Digital Network) devices. It includes the mISDN (mini ISDN) subsystem, which is responsible for handling ISDN communication. The mISDN subsystem allows ISDN devices to connect to the Linux system and enables various telephony-related functionalities.

Vulnerability Detail

This vulnerability in the isdn: mISDN package involves a sleeping function being called from an invalid context. The specific details of the vulnerability are as follows:

Origin: The issue arises due to the improper usage of a sleeping function in a context where it is not allowed.
Impact: Calling a sleeping function from an invalid context can lead to system instability, crashes, or other unpredictable behavior.
Technical Details: The vulnerability is fixed in Linux Kernel version v5.10.76 by commit 9f591cbdbed3d7822b2bdba89b34a6d7b434317d. The fix ensures that the sleeping function is called from a valid context, preventing any potential issues.

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 package in the Linux Kernel is vulnerable to a sleeping function being called from an invalid context. This can result in system instability and crashes. It is recommended to update the Linux Kernel to version v5.10.76 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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