# CVE-2024-47603: GHSL-2024-251: GStreamer NULL-pointer dereference in Matroska/WebM demuxer

> A null pointer dereference in the GStreamer Matroska demuxer allows attackers to cause a denial of service via crafted media files.

- **Severity:** Medium 6.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 11 Dec 2024
- **Updated:** 3 Nov 2025
- **Also known as:** AZL-62378, DEBIAN-CVE-2024-47603, UBUNTU-CVE-2024-47603

## What is CVE-2024-47603?

CVE-2024-47603 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 11 Dec 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

GStreamer is a library for constructing graphs of media-handling components. A null pointer dereference vulnerability has been discovered in the gst_matroska_demux_update_tracks function within matroska-demux.c. The vulnerability occurs when the gst_caps_is_equal function is called with invalid caps values. If this happen, then in the function gst_buffer_get_size the call to GST_BUFFER_MEM_PTR can return a null pointer. Attempting to dereference the size field of this null pointer results in a null pointer dereference. This vulnerability is fixed in 1.24.10.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2024-47603?

It affects 1 product.


Products: Gstreamer Gstreamer.

## How do I fix CVE-2024-47603?

Upgrade to a fixed version.

## Is CVE-2024-47603 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-47603 exists.

## Other vulnerabilities in Gstreamer Gstreamer

- [CVE-2026-3083](https://insights.sbomify.com/CVE-2026-3083/): GStreamer rtpqdm2depay Out-Of-Bounds Write Remote Code Execution Vulnerability (high 8.8)
- [CVE-2026-3085](https://insights.sbomify.com/CVE-2026-3085/): GStreamer rtpqdm2depay Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-37328](https://insights.sbomify.com/CVE-2023-37328/): GStreamer PGS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-37329](https://insights.sbomify.com/CVE-2023-37329/): GStreamer SRT File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability (high 8.8)
- [CVE-2023-38103](https://insights.sbomify.com/CVE-2023-38103/): GStreamer RealMedia File Parsing Integer Overflow Remote Code Execution Vulnerability (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-47603 and fix it if it is affected.

What it is: CVE-2024-47603 is a medium-severity vulnerability in Gstreamer Gstreamer, published on 11 Dec 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-47603 exists.

Affected product: Gstreamer Gstreamer. 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-2024-47603/ (Markdown: https://insights.sbomify.com/CVE-2024-47603/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-47603
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-47603
- OSV: https://osv.dev/vulnerability/CVE-2024-47603

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-47603/
Summaries are generated and may contain mistakes; the official description above is the record.