# CVE-2026-80596: Input: ims-pcu - only expose sysfs attributes on control interface

> Accessing sysfs attributes on the wrong USB interface in the ims-pcu driver can cause unexpected behavior or crashes, leading to denial of service.

- **Severity:** High 8.4 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **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:** 28 Aug 2026
- **Updated:** 29 Aug 2026
- **Also known as:** BELL-CVE-2026-80596, DEBIAN-CVE-2026-80596, GHSA-9f8c-25qh-cpfj, UBUNTU-CVE-2026-80596

## What is CVE-2026-80596?

CVE-2026-80596 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 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:

Input: ims-pcu - only expose sysfs attributes on control interface

When the driver was converted to use the driver core to instantiate device
attributes (via .dev_groups in the usb_driver structure), the attributes
started appearing on all interfaces bound to the driver. Since the ims-pcu
driver manually claims the secondary data interface during probe, the
driver core automatically creates the sysfs attributes for that interface
as well.

However, the driver only supports these attributes on the primary control
interface. Data interfaces lack the necessary descriptors and internal
state to handle these requests, and accessing them can lead to unexpected
behavior or crashes.

Fix this by updating the is_visible() callbacks for both the main and OFN
attribute groups to verify that the interface being accessed is indeed the
control interface.

## Which versions are affected by CVE-2026-80596?


## How do I fix CVE-2026-80596?

Apply the vendor's patch.

## Is CVE-2026-80596 being exploited?

There is no known exploitation of CVE-2026-80596 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80596 and fix it if it is affected.

What it is: CVE-2026-80596 is a high-severity denial of service vulnerability in Linux, published on 28 Aug 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-2026-80596 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-2026-80596/ (Markdown: https://insights.sbomify.com/CVE-2026-80596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80596
- OSV: https://osv.dev/vulnerability/CVE-2026-80596

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-80596/
Summaries are generated and may contain mistakes; the official description above is the record.