# CVE-2020-25650: Denial of service in spice-vdagent

> A local unprivileged user can cause a memory denial of service in the spice-vdagentd daemon via the UNIX domain socket, impacting system availability.

- **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:** 25 Nov 2020
- **Updated:** 4 Aug 2024
- **Also known as:** AZL-7362, DEBIAN-CVE-2020-25650, GHSA-f637-jpfq-3wv2, UBUNTU-CVE-2020-25650

## What is CVE-2020-25650?

CVE-2020-25650 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 25 Nov 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual machine. Any unprivileged local guest user with access to the UNIX domain socket path `/run/spice-vdagentd/spice-vdagent-sock` could use this flaw to perform a memory denial of service for spice-vdagentd or even other processes in the VM system. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and previous versions.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2020-25650?

It affects 3 products.


Products: Debian Debian Linux, Fedoraproject Fedora, Spice-Space Spice-Vdagent.

## How do I fix CVE-2020-25650?

Upgrade to a fixed version.

## Is CVE-2020-25650 being exploited?

There is no known exploitation of CVE-2020-25650 in the wild and no public exploit code.

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- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
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- [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-2020-25650 and fix it if it is affected.

What it is: CVE-2020-25650 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 25 Nov 2020. 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-2020-25650 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-2020-25650/ (Markdown: https://insights.sbomify.com/CVE-2020-25650/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-25650
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-25650
- OSV: https://osv.dev/vulnerability/CVE-2020-25650

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-25650/
Summaries are generated and may contain mistakes; the official description above is the record.