Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2021-47643
CVE-2021-47643:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2021-47643 affects the Linux kernel's media subsystem, specifically in the irtoy driver component. The vulnerability was discovered and resolved in December 2021, involving a memory leak in the error handling path of the driver. The issue occurs in the irtoyprobe function when handling USB device initialization (Kernel Git).
Technical details
The vulnerability exists in the irtoy.c driver file where a memory leak occurs during error handling. Specifically, when usbsubmiturb() fails, the code directly returns the error without properly freeing allocated resources. The fix involves changing the error handling to use goto freercdev instead of directly returning the error, ensuring proper cleanup (Kernel Git).
Impact
The vulnerability results in a memory leak when error conditions occur during device initialization. While the immediate impact is resource leakage, repeated occurrences could lead to system resource exhaustion (NVD).
Mitigation and workarounds
The issue has been fixed in the Linux kernel through a patch that properly handles resource cleanup in error paths. The fix was implemented by Peiwei Hu and has been merged into the kernel mainline and stable trees (Kernel Git).
Additional resources
Source: This report was generated using AI
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