CVE-2022-50760
Unknown
Unknown - Not Provided
Reference Count Leak in Linux amdgpu PCI Device Handling
Publication date: 2025-12-24
Last updated on: 2025-12-24
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios()
As comment of pci_get_class() says, it returns a pci_device with its
refcount increased and decreased the refcount for the input parameter
@from if it is not NULL.
If we break the loop in amdgpu_atrm_get_bios() with 'pdev' not NULL, we
need to call pci_dev_put() to decrease the refcount. Add the missing
pci_dev_put() to avoid refcount leak.
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a reference count leak in the Linux kernel's amdgpu driver, specifically in the function amdgpu_atrm_get_bios(). The issue occurs because the function fails to call pci_dev_put() to decrease the reference count of a PCI device when breaking a loop with a non-NULL device pointer, leading to a refcount leak.
How can this vulnerability impact me? :
The reference count leak can lead to resource management issues in the kernel, potentially causing memory leaks or instability in the system due to unreleased PCI device references.
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