# CVE-2023-46929: Denial of service in n/a

> Attackers can crash the GPAC MP4Box application via a flaw in AVC VUI parsing, affecting users of the multimedia library.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 3 Jan 2024
- **Updated:** 18 Jun 2025
- **Also known as:** GHSA-phvj-2xc5-g994, UBUNTU-CVE-2023-46929

## What is CVE-2023-46929?

CVE-2023-46929 is a high-severity denial of service vulnerability in Gpac Gpac, published on 3 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue discovered in GPAC 2.3-DEV-rev605-gfc9e29089-master in MP4Box in gf_avc_change_vui /afltest/gpac/src/media_tools/av_parsers.c:6872:55 allows attackers to crash the application.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-46929?

It affects 1 product.


Products: Gpac Gpac.

## How do I fix CVE-2023-46929?

No fix has been published for CVE-2023-46929 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-46929 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46929 exists.

## Other vulnerabilities in Gpac Gpac

- [CVE-2023-46427](https://insights.sbomify.com/CVE-2023-46427/): Null dereference in n/a (critical 9.8)
- [CVE-2023-46932](https://insights.sbomify.com/CVE-2023-46932/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-36190](https://insights.sbomify.com/CVE-2022-36190/): Use after free in n/a (critical 9.8)
- [CVE-2021-28300](https://insights.sbomify.com/CVE-2021-28300/): Null dereference in n/a (critical 9.8)
- [CVE-2020-11558](https://insights.sbomify.com/CVE-2020-11558/): Use after free in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-46929 and fix it if it is affected.

What it is: CVE-2023-46929 is a high-severity denial of service vulnerability in Gpac Gpac, published on 3 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-46929 exists.

Affected product: Gpac Gpac. 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-2023-46929/ (Markdown: https://insights.sbomify.com/CVE-2023-46929/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-46929
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-46929
- OSV: https://osv.dev/vulnerability/CVE-2023-46929

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-46929/
Summaries are generated and may contain mistakes; the official description above is the record.