# CVE-2025-7797: GPAC dash_client.c gf_dash_download_init_segment null pointer dereference

> A remote attacker can cause a denial of service in GPAC via a null pointer dereference in the DASH client, requiring a patch.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jul 2025
- **Updated:** 18 Jul 2025
- **Also known as:** DEBIAN-CVE-2025-7797, GHSA-45x8-4rg4-4ffp, UBUNTU-CVE-2025-7797

## What is CVE-2025-7797?

CVE-2025-7797 is a medium-severity vulnerability in Gpac Gpac, published on 18 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was found in GPAC up to 2.4. It has been rated as problematic. Affected by this issue is the function gf_dash_download_init_segment of the file src/media_tools/dash_client.c. The manipulation of the argument base_init_url leads to null pointer dereference. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The patch is identified as 153ea314b6b053db17164f8bc3c7e1e460938eaa. It is recommended to apply a patch to fix this issue.

Weakness: CWE-476 (NULL Pointer Dereference), CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2025-7797?

It affects 1 product.


Products: Gpac Gpac.

## How do I fix CVE-2025-7797?

No fix has been published for CVE-2025-7797 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7797 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7797 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-2025-7797 and fix it if it is affected.

What it is: CVE-2025-7797 is a medium-severity vulnerability in Gpac Gpac, published on 18 Jul 2025. 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-2025-7797 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-2025-7797/ (Markdown: https://insights.sbomify.com/CVE-2025-7797/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7797
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7797
- OSV: https://osv.dev/vulnerability/CVE-2025-7797

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7797/
Summaries are generated and may contain mistakes; the official description above is the record.