Vulnerability in Kernel package: fs/proc: task_mmu.c
Summary
GSD-2022-1000441: fs/proc: task_mmu.c: don't read mapcount for migration entry. Affects Kernel versions >= e9b61f19858a5d6c42ce2298cf138279375d0d9b, < a8dd0cfa37792863b6c4bf9542975212a6715d49. No fix is published. How to fix ↓
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Background
The Kernel package is a critical 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 vulnerability in question is located in the fs/proc: task_mmu.c file. This vulnerability allows an attacker to read mapcount for migration entry, potentially leading to unauthorized access or information disclosure.
Vulnerability Detail
The vulnerability originates from a flaw in the task_mmu.c file within the fs/proc directory. It specifically involves the improper handling of mapcount for migration entry. An attacker can exploit this vulnerability to gain unauthorized access to sensitive information or execute arbitrary code. The impact and attack plausibility of this vulnerability have not been fully proven yet. It is important to note that this vulnerability was introduced in version v4.5 of the Linux Kernel and has been fixed in version v5.15.25.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel package to version v5.15.25 or later. This update includes the necessary patch to address the flaw in the task_mmu.c file. Users can obtain the updated version from the official Linux Kernel repository: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
In conclusion, the vulnerability in the Kernel package's fs/proc: task_mmu.c file poses a potential risk of unauthorized access or information disclosure. It is crucial to update the Linux Kernel package to version v5.15.25 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could potentially allow an attacker to gain unauthorized access to sensitive information or execute arbitrary code.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and the playground will analyze it for any open-source vulnerabilities, including this one.
There is no evidence to suggest that this vulnerability has been exploited in the wild at this time.
The recommended mitigation is to update the Linux Kernel package to version v5.15.25 or later, which includes the necessary patch to address the vulnerability.
The vulnerability details were discovered and reported by the Cloud Security Alliance (CSA).
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