Lock Order Reversal Vulnerability in md_alloc
Summary
GSD-2021-1001666: md: fix a lock order reversal in md_alloc. Affects Kernel versions >= b0140891a8cea36469f58d23859e599b1122bd37, < b18ba3f477a2fdd12d2ca2e01d2bd874968714e2. 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 md_alloc function within the Kernel package is responsible for allocating memory for metadata structures used by the Multiple Devices (MD) subsystem. These structures are crucial for managing software RAID arrays. However, a vulnerability has been discovered in the md_alloc function that can lead to a lock order reversal.
Vulnerability Detail
The lock order reversal vulnerability in md_alloc arises when the function acquires locks in an incorrect order, potentially resulting in a deadlock situation. This vulnerability can be exploited by an attacker to cause a denial-of-service (DoS) condition or potentially execute arbitrary code with elevated privileges. The vulnerability was introduced in version v3.0 of the Linux Kernel and was fixed in version v5.10.70 by commit b18ba3f477a2fdd12d2ca2e01d2bd874968714e2.
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 strongly advised to apply the recommended fix by updating the Linux Kernel package to the patched version.
Conclusion
The lock order reversal vulnerability in md_alloc within the Kernel package can lead to a deadlock situation and potential unauthorized code execution. It is crucial to update the Linux Kernel package to version v5.10.70 or later to mitigate this vulnerability. No known exploits have been disclosed at the time of this report, but it is recommended to apply the fix promptly. For further support, contact DevNack.com.
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FAQ
The vulnerability can lead to a deadlock situation, causing a denial-of-service (DoS) condition or potentially enabling an attacker to execute arbitrary code with elevated privileges.
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 to the playground, and it will analyze and alert you in real-time if the vulnerability is present.
At the time of this report, no known exploits for this vulnerability have been disclosed. However, it is crucial to apply the recommended fix to mitigate the risk.
Yes, this vulnerability can be exploited remotely if an attacker can gain access to the affected system.
For further support on vulnerability remediation, you can contact info@devnack.com. Their team of experts can provide guidance and assistance in addressing this vulnerability.
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