Vulnerability in Kernel package: isdn: mISDN: Fix sleeping function called from invalid context
Summary
UVI-2021-1001778: isdn: mISDN: Fix sleeping function called from invalid context. Affects Kernel versions < ef269a8808cb1759245a98a7fe16fceaebad894c. No fix is published. How to fix ↓
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Background
The Kernel package is a crucial component of the Linux operating system, responsible for managing the system's core functionality. It provides essential services such as process management, memory management, and device drivers. The isdn module within the Kernel package is responsible for handling Integrated Services Digital Network (ISDN) connections. ISDN is a telecommunications standard used for transmitting voice, video, and data over digital lines.
The vulnerability in the isdn module arises from a sleeping function being called from an invalid context. This can lead to various issues, including system instability, crashes, and potential privilege escalation attacks. The vulnerability has been identified and addressed in the Linux Kernel version v4.9.288 by commit ef269a8808cb1759245a98a7fe16fceaebad894c.
Vulnerability Detail
The vulnerability in the isdn module of the Kernel package occurs when a sleeping function is invoked from an invalid context. This can happen when a function that is not allowed to sleep is called while the system is in a context where sleeping is prohibited. Sleeping functions are used to pause the execution of a process or thread for a specific period of time.
Calling a sleeping function from an invalid context can have several consequences. It can lead to system instability, causing crashes or freezes. Additionally, an attacker may be able to exploit this vulnerability to escalate their privileges and gain unauthorized access to the system.
The vulnerability has been fixed in the Linux Kernel version v4.9.288 by commit ef269a8808cb1759245a98a7fe16fceaebad894c.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in the isdn module of the Kernel package has been addressed in the Linux Kernel version v4.9.288. To ensure the security and stability of your system, it is recommended to update the Kernel package to the latest version. Regularly updating the Kernel package is essential to protect against potential vulnerabilities and exploits. If you need further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to system instability, crashes, and potential privilege escalation attacks. It is important to update the Linux Kernel package to mitigate these risks.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and the Vulert Playground will analyze it for open-source vulnerabilities.
At the time of this report, there are no known exploits for this vulnerability. However, it is still important to update the Linux Kernel package to prevent any potential future exploits.
There are no specific workarounds mentioned for this vulnerability. It is recommended to update the Linux Kernel package to the latest version as a preventive measure.
You can find more information about the fix for this vulnerability in the Linux Kernel repository. The fix is implemented in commit ef269a8808cb1759245a98a7fe16fceaebad894c.
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