Vulnerability in Kernel: mce: fix set_mce_nospec to always unmap the whole page
Summary
GSD-2022-1003037: mce: fix set_mce_nospec to always unmap the whole page. Affects Kernel versions >= 284ce4011ba60d6c487b668eea729b6294930806, < ab081a142fa52a2156741a9023beb7077255c300. 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
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability in question affects the Kernel's 'mce' module, which is responsible for handling machine check exceptions (MCEs). MCEs occur when the CPU detects hardware errors or inconsistencies. This vulnerability specifically pertains to the 'set_mce_nospec' function within the 'mce' module.
Vulnerability Detail
The 'set_mce_nospec' function in the Kernel's 'mce' module has a flaw that can lead to a partial unmapping of a page instead of the intended full unmapping. This vulnerability can be exploited by an attacker to gain unauthorized access to sensitive information or execute arbitrary code. By leveraging this vulnerability, an attacker may be able to bypass security measures and escalate privileges. 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
No specific workaround has been provided for this vulnerability.
Conclusion
In conclusion, the Kernel's 'mce' module contains a vulnerability in the 'set_mce_nospec' function that can result in a partial unmapping of a page instead of the intended full unmapping. This vulnerability can potentially be exploited to gain unauthorized access or execute arbitrary code. It is crucial to update the Linux Kernel to version v5.17.14 or later to mitigate this vulnerability. For additional support and guidance, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The impact of this vulnerability can potentially allow an attacker to gain unauthorized access to sensitive information or execute arbitrary code, leading to various security breaches and potential system compromise.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json.
At the time of this report, no known exploit has been identified for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
The specific prerequisites for exploiting this vulnerability have not been disclosed. However, it is always advisable to keep your system up to date with the latest security patches and updates.
For further support on vulnerability remediation, you can reach out to info@devnack.com. They can provide guidance and assistance in addressing this vulnerability.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
Habilume
Habit tracker with a companion that grows with you
Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent.
