CVE-2022-50830
Unknown Unknown - Not Provided
Memory Leak in Linux Kernel auxdisplay hd44780 Driver

Publication date: 2025-12-30

Last updated on: 2025-12-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: auxdisplay: hd44780: Fix potential memory leak in hd44780_remove() hd44780_probe() allocates a memory chunk for hd with kzalloc() and makes "lcd->drvdata->hd44780" point to it. When we call hd44780_remove(), we should release all relevant memory and resource. But "lcd->drvdata ->hd44780" is not released, which will lead to a memory leak. We should release the "lcd->drvdata->hd44780" in hd44780_remove() to fix the memory leak bug.
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Meta Information
Published
2025-12-30
Last Modified
2025-12-30
Generated
2026-06-16
AI Q&A
2025-12-30
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50830
EUVD
EUVD-2022-55868
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a memory leak in the Linux kernel's auxdisplay hd44780 driver. Specifically, the hd44780_probe() function allocates memory for a structure using kzalloc(), but the corresponding hd44780_remove() function does not release this allocated memory. As a result, the memory pointed to by lcd->drvdata->hd44780 is not freed, causing a memory leak.

Impact Analysis

The memory leak caused by this vulnerability can lead to increased memory usage over time, potentially degrading system performance or causing resource exhaustion if the driver is repeatedly loaded and unloaded without releasing memory properly.

Mitigation Strategies

To mitigate this vulnerability, update your Linux kernel to a version where the hd44780_remove() function properly releases the allocated memory, fixing the memory leak. Applying the latest kernel patches or updates that address this issue is recommended.

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