# CVE-2026-38343: Integer overflow in n/a

> Attackers can cause a Denial of Service in FFmpeg by supplying a crafted video file that triggers an integer overflow in the scale filter.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 27 Aug 2026
- **Updated:** 31 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-38343, GHSA-p275-5394-cxwq, UBUNTU-CVE-2026-38343

## What is CVE-2026-38343?

CVE-2026-38343 is a medium-severity vulnerability in n/a, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

An integer overflow in the libavfilter/vf_scale.c component of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via supplying a crafted video file.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-38343?


## How do I fix CVE-2026-38343?

Upgrade to a fixed version.

## Is CVE-2026-38343 being exploited?

There is no known exploitation of CVE-2026-38343 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-38343 and fix it if it is affected.

What it is: CVE-2026-38343 is a medium-severity vulnerability in n/a, published on 27 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-38343 in the wild and no public exploit code.

Affected product: n/a. 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-2026-38343/ (Markdown: https://insights.sbomify.com/CVE-2026-38343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-38343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-38343
- OSV: https://osv.dev/vulnerability/CVE-2026-38343

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-38343/
Summaries are generated and may contain mistakes; the official description above is the record.