Vulnerability in Kernel: sysrq Backtrace of Active CPUs
Summary
GSD-2022-1003208: sysrq: do not omit current cpu when showing backtrace of all active CPUs. Affects Kernel versions < 98cf0cd959ef36eee86e84c00cedd40083073899. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The Kernel is a critical component of the Linux operating system that manages communication between hardware and software. It provides essential services and functions for the system's operation. The sysrq feature allows users to send various commands to the Kernel for debugging and troubleshooting purposes. One of these commands is used to display a backtrace of all active CPUs, which can help identify issues and potential vulnerabilities within the system.
Vulnerability Detail
The sysrq feature in the Kernel omits the current CPU when displaying a backtrace of all active CPUs. This omission can lead to incomplete information and hinder the identification of potential issues. An attacker could potentially exploit this vulnerability to hide their activities or evade detection by leveraging the omission of the current CPU. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, users can mitigate the risk by updating their Kernel to the fixed version as mentioned in the 'how_to_fix' section.
Conclusion
The vulnerability in the Kernel's sysrq feature, which omits the current CPU when displaying a backtrace of all active CPUs, can be mitigated by updating the Kernel to version v5.15.47 or later. This ensures that the backtrace includes the current CPU and provides complete information for debugging and troubleshooting purposes. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The Kernel is a critical component of the Linux operating system that manages communication between hardware and software.
The sysrq feature allows users to send various commands to the Kernel for debugging and troubleshooting purposes.
A backtrace is a report that shows the sequence of function calls leading up to a particular point in the code. It helps identify the execution path and potential issues within the system.
This vulnerability could potentially be exploited by an attacker to hide their activities or evade detection by leveraging the omission of the current CPU in the sysrq backtrace.
Yes, the vulnerability has been fixed in Linux Kernel version v5.15.47 by commit 98cf0cd959ef36eee86e84c00cedd40083073899.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
