Vulnerability in Kernel: mm/secretmem - Panic When Growing a memfd_secret
Summary
GSD-2022-1000965: mm/secretmem: fix panic when growing a memfd_secret. Affects Kernel versions < 9d3b877daf805fed29be8f61aa3d0ea37df82c7b. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and provides an interface for applications to interact with hardware. It is responsible for memory management, process scheduling, device drivers, and other essential functions. The mm/secretmem subsystem in the Kernel allows the creation and management of memfd_secret objects, which are used to securely store sensitive data in memory. However, a vulnerability has been discovered in this subsystem that can lead to a panic when attempting to grow a memfd_secret object.
Vulnerability Detail
The vulnerability in the mm/secretmem subsystem of the Kernel arises when attempting to expand the size of a memfd_secret object. This can trigger a panic, causing the system to crash. An attacker could potentially exploit this vulnerability to disrupt the normal operation of the system or execute a denial-of-service attack. The issue has been addressed in Linux Kernel version v5.17.4 by commit 9d3b877daf805fed29be8f61aa3d0ea37df82c7b.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is necessary to apply the fix by updating the Linux Kernel.
Conclusion
The vulnerability in the mm/secretmem subsystem of the Kernel can result in a system crash when attempting to grow a memfd_secret object. It is crucial to update the Linux Kernel to version v5.17.4 or later to mitigate this vulnerability. For further assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a system crash, potentially disrupting the normal operation of the system or enabling a denial-of-service attack.
No, this vulnerability requires local access to the system.
No, the vulnerability is fixed in Linux Kernel version v5.17.4 and later.
There is no known exploit at the time of this report.
Yes, a system restart is required for the updated Kernel to take effect.
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