Vulnerability in Kernel: mm: memcg: synchronize objcg lists with a dedicated spinlock
Summary
GSD-2022-1000530: mm: memcg: synchronize objcg lists with a dedicated spinlock. Affects Kernel versions >= bf4f059954dcb221384b2f784677e19a13cd4bdb, < babfa07e9594373e10b9c01ada6278d0248665e1. 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 system resources and facilitates communication between hardware and software. It provides essential functionality for the proper functioning of the system. The mm (memory management) subsystem within the Kernel is responsible for managing memory allocation and deallocation. Within the mm subsystem, the memcg (memory control group) feature allows for resource isolation and control of memory usage by different processes or groups of processes. However, a vulnerability has been discovered in the mm subsystem that affects the synchronization of objcg (object control group) lists. This vulnerability can potentially be exploited to gain unauthorized access or cause denial of service.
Vulnerability Detail
The vulnerability in the Kernel's mm subsystem arises from a lack of proper synchronization of objcg lists. This can lead to race conditions and data inconsistencies when multiple processes or threads attempt to access or modify the lists concurrently. An attacker could potentially exploit this vulnerability to manipulate the objcg lists, leading to unauthorized access to sensitive data or causing system instability. The vulnerability was introduced in version v5.9 of the Linux Kernel and has been fixed in version v5.16.10.
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 available for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel as mentioned in the 'how_to_fix' section.
Conclusion
The vulnerability in the Kernel's mm subsystem, specifically in the synchronization of objcg lists, can pose significant security risks if left unaddressed. It is crucial to update the Linux Kernel to version v5.16.10 or later to mitigate these risks. Additionally, using tools like Vulert Playground can help identify if your system is affected by this vulnerability. Prompt action should be taken to ensure the security and stability of the system.
See every vulnerability recorded for Kernel →
FAQ
The vulnerability can potentially allow unauthorized access to sensitive data or cause system instability.
You can use the Vulert Playground (https://vulert.com/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 any open-source vulnerabilities, including this one.
The exact exploitability of this vulnerability depends on various factors, including the system configuration and network setup. However, in general, remote exploitation is possible if an attacker can gain access to the targeted system.
There are no known instances of this vulnerability being actively exploited in the wild. However, it is important to apply the fix as soon as possible to mitigate any potential risks.
For further support and assistance with vulnerability remediation, you can reach out to info@devnack.com. Our team of experts will be happy to assist you.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
