Critical Use-After-Free Vulnerability in Linux Kernel - CVE-2022-49694
Summary
CVE-2022-49694: In the Linux kernel, the following vulnerability has been resolved: block: disable the elevator int del_gendisk The elevator is only used for file system requests, which are stopped in del_gendisk. Affects linux versions < 5.18.14-1. Fixed in 5.18.14-1. 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 Linux kernel is the core component of many operating systems, providing essential services for hardware management and system resource allocation. It is known for its stability, performance, and security features. However, like any complex software, it is susceptible to vulnerabilities that can compromise system integrity and security. CVE-2022-49694 specifically affects the block layer of the Linux kernel, which is responsible for managing block devices and their I/O operations.
Vulnerability Detail
CVE-2022-49694 is a use-after-free vulnerability that occurs in the Linux kernel's block layer during the deletion of a generic disk (del_gendisk). The elevator, which is used for managing I/O scheduling for file system requests, is disabled prematurely, leading to a situation where the scheduler tags may be accessed after they have been freed. This can result in undefined behavior, potential data corruption, or system crashes, posing a significant risk to system stability and security.
How To Fix
Minimum fixed version
5.18.14-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the patch as soon as it is available.
Conclusion
CVE-2022-49694 is a critical vulnerability in the Linux kernel that poses significant risks to system stability and security. It is essential for users to update their systems to the patched version to mitigate these risks. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
See every vulnerability recorded for linux →
FAQ
CVE-2022-49694 is a use-after-free vulnerability in the Linux kernel's block layer that can lead to system instability and security risks.
This vulnerability can cause undefined behavior, potential data corruption, or system crashes, impacting the overall stability and security of your system.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without any signup.
While there are no specific workarounds, it is crucial to prioritize updating your system to mitigate the risks associated with this vulnerability.
You can find detailed information about CVE-2022-49694 in the official CVE database or security advisories related to the Linux kernel.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
