CVE-2022-50718
Unknown Unknown - Not Provided
Reference Count Leak in Linux Kernel AMDGPU PCI Device Handling

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix pci device refcount leak As comment of pci_get_domain_bus_and_slot() says, it returns a pci device with refcount increment, when finish using it, the caller must decrement the reference count by calling pci_dev_put(). So before returning from amdgpu_device_resume|suspend_display_audio(), pci_dev_put() is called to avoid refcount leak.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-14
NVD
CVE-2022-50718
EUVD
EUVD-2022-55771
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a reference count leak in the Linux kernel's AMD GPU driver (drm/amdgpu). Specifically, the function pci_get_domain_bus_and_slot() increments the reference count of a PCI device, and the caller is responsible for decrementing it by calling pci_dev_put(). The vulnerability occurred because pci_dev_put() was not called before returning from the functions amdgpu_device_resume and suspend_display_audio, causing a reference count leak.

Impact Analysis

The reference count leak can lead to resource leaks in the kernel, potentially causing increased memory usage or instability in the system over time as PCI device references are not properly released.

Mitigation Strategies

Apply the updated Linux kernel patch that fixes the pci device reference count leak in the amdgpu driver by ensuring pci_dev_put() is called appropriately in amdgpu_device_resume and suspend_display_audio functions.

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