# CVE-2026-89463: power: supply: ucs1002: fix use-after-free on remove

> A use-after-free vulnerability in the Linux kernel UCS1002 power supply driver allows local attackers to cause denial of service or execute code during device removal.

- **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:** 11 Sep 2026
- **Updated:** 19 Oct 2026
- **Also known as:** AZL-100079, BELL-CVE-2026-89463, DEBIAN-CVE-2026-89463, GHSA-p52j-g5j4-c2w7, UBUNTU-CVE-2026-89463

## What is CVE-2026-89463?

CVE-2026-89463 is an use after free vulnerability in Linux, published on 11 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:

power: supply: ucs1002: fix use-after-free on remove

ucs1002 has no remove callback, so unbind runs entirely through devm.
The alert IRQ handler queues the health_poll delayed work, and the work
reschedules itself while the chip reports a bad-health condition.  devm
frees the alert IRQ, which only synchronizes the handler; it does not
cancel the delayed work, which can then run after devm frees the driver
data and dereference it.

Register health_poll with devm_delayed_work_autocancel() before the
alert IRQ is requested.  devm then frees the IRQ before cancelling the
work, so the handler can no longer queue it and the work is cancelled
before the driver data is freed.

This issue was found by an in-house static analysis tool.

## Which versions are affected by CVE-2026-89463?


## How do I fix CVE-2026-89463?

Apply the vendor's patch.

## Is CVE-2026-89463 being exploited?

There is no known exploitation of CVE-2026-89463 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-89463 and fix it if it is affected.

What it is: CVE-2026-89463 is an use after free vulnerability in Linux, published on 11 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-2026-89463 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-2026-89463/ (Markdown: https://insights.sbomify.com/CVE-2026-89463/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-89463
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89463
- OSV: https://osv.dev/vulnerability/CVE-2026-89463

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-89463/
Summaries are generated and may contain mistakes; the official description above is the record.