# CVE-2025-39709: media: venus: protect against spurious interrupts during probe

> A race condition during Linux kernel boot can cause a NULL pointer dereference in the Venus media driver, leading to a system crash.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **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:** 5 Sep 2025
- **Updated:** 5 Aug 2026
- **Also known as:** AZL-66929, BELL-CVE-2025-39709, DEBIAN-CVE-2025-39709, GHSA-3px4-cc65-vwjj, ROOT-OS-DEBIAN-11-CVE-2025-39709, ROOT-OS-DEBIAN-12-CVE-2025-39709, ROOT-OS-DEBIAN-13-CVE-2025-39709, ROOT-OS-UBUNTU-2204-CVE-2025-39709, ROOT-OS-UBUNTU-2404-CVE-2025-39709, UBUNTU-CVE-2025-39709

## What is CVE-2025-39709?

CVE-2025-39709 is a medium-severity vulnerability in Debian Debian Linux, published on 5 Sep 2025. 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:

media: venus: protect against spurious interrupts during probe

Make sure the interrupt handler is initialized before the interrupt is
registered.

If the IRQ is registered before hfi_create(), it's possible that an
interrupt fires before the handler setup is complete, leading to a NULL
dereference.

This error condition has been observed during system boot on Rb3Gen2.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2025-39709?

It affects 2 products.


Products: Debian Debian Linux, Linux kernel.

## How do I fix CVE-2025-39709?

Apply the vendor's patch.

## Is CVE-2025-39709 being exploited?

There is no known exploitation of CVE-2025-39709 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-39709 and fix it if it is affected.

What it is: CVE-2025-39709 is a medium-severity vulnerability in Debian Debian Linux, published on 5 Sep 2025. 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-2025-39709 in the wild and no public exploit code.

Affected product: Debian Debian 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-2025-39709/ (Markdown: https://insights.sbomify.com/CVE-2025-39709/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-39709
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-39709
- OSV: https://osv.dev/vulnerability/CVE-2025-39709

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-39709/
Summaries are generated and may contain mistakes; the official description above is the record.