# CVE-2026-93089: firmware: arm_scmi: Free transport channel on IDR failure

> A memory management error in the Linux kernel SCMI driver can lead to resource leaks or crashes when IDR insertion fails, requiring a kernel patch.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 17 Sep 2026
- **Updated:** 19 Oct 2026
- **Also known as:** AZL-102548, BELL-CVE-2026-93089, DEBIAN-CVE-2026-93089, GHSA-x7f6-mwmw-m629, UBUNTU-CVE-2026-93089

## What is CVE-2026-93089?

CVE-2026-93089 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

## Which versions are affected by CVE-2026-93089?


## How do I fix CVE-2026-93089?

Apply the vendor's patch.

## Is CVE-2026-93089 being exploited?

There is no known exploitation of CVE-2026-93089 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93089 and fix it if it is affected.

What it is: CVE-2026-93089 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-93089 in the wild and no public exploit code.

Affected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-93089/ (Markdown: https://insights.sbomify.com/CVE-2026-93089/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93089
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93089
- OSV: https://osv.dev/vulnerability/CVE-2026-93089

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93089/
Summaries are generated and may contain mistakes; the official description above is the record.