# CVE-2026-93117: usb: fix UAF when probe runs concurrent to dyn ID removal

> A use-after-free in the Linux kernel USB subsystem allows local attackers to execute code or escalate privileges via concurrent probe and ID removal.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **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-102279, BELL-CVE-2026-93117, DEBIAN-CVE-2026-93117, GHSA-3wfq-66x9-qqjc, UBUNTU-CVE-2026-93117

## What is CVE-2026-93117?

CVE-2026-93117 is an use after free 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:

usb: fix UAF when probe runs concurrent to dyn ID removal

Dynamic IDs are only guaranteed to be valid when usb_dynids_lock is held,
as remove_id_store can free the node. Thus, make a copy in
usb_probe_interface. Clarify the documentation that the id parameter is
only valid during the probe.

USB serial has the same pattern, but it does not need fixing as the IDs
cannot be removed via sysfs.

## Which versions are affected by CVE-2026-93117?


## How do I fix CVE-2026-93117?

Apply the vendor's patch.

## Is CVE-2026-93117 being exploited?

There is no known exploitation of CVE-2026-93117 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-93117 and fix it if it is affected.

What it is: CVE-2026-93117 is an use after free 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-2026-93117 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-2026-93117/ (Markdown: https://insights.sbomify.com/CVE-2026-93117/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-93117
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93117
- OSV: https://osv.dev/vulnerability/CVE-2026-93117

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-93117/
Summaries are generated and may contain mistakes; the official description above is the record.