BaseFortify

Publication date: 2025-10-04

Last updated on: 2026-03-25

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix pci device refcount leak in ppr_notifier() 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 call it before returning from ppr_notifier() to avoid refcount leak.

CVSS Scores

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Meta Information

Published

2025-10-04

Last Modified

2026-03-25

Generated

2026-07-06

AI Q&A

2025-10-04

EPSS Evaluated

2026-07-05

NVD

CVE-2022-50505

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 5.15.160 (inc) to 5.16 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is a reference count leak in the Linux kernel's AMD IOMMU code, specifically in the ppr_notifier() function. The function pci_get_domain_bus_and_slot() returns a PCI device with its reference count incremented, and the caller must decrement this count by calling pci_dev_put() when done. The vulnerability occurs because ppr_notifier() fails to call pci_dev_put() before returning, 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 over time as PCI device references are not properly released.

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