# CVE-2025-7069: HDF5 H5FSsection.c H5FS__sect_link_size heap-based overflow

> A heap-based buffer overflow in the HDF5 library allows local attackers to potentially execute arbitrary code or cause a denial of service.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 4 Jul 2025
- **Updated:** 8 Jul 2025
- **Also known as:** DEBIAN-CVE-2025-7069, ECHO-aca6-bc3a-42ce, GHSA-8qx3-g6mx-gvp7, JLSEC-2026-351, ROOT-OS-DEBIAN-12-CVE-2025-7069, UBUNTU-CVE-2025-7069

## What is CVE-2025-7069?

CVE-2025-7069 is a medium-severity memory corruption vulnerability in Hdfgroup Hdf5, published on 4 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5FS__sect_link_size of the file src/H5FSsection.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.

Weakness: CWE-122 (Heap-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-7069?

It affects 1 product.


Products: Hdfgroup Hdf5.

## How do I fix CVE-2025-7069?

Apply the vendor's patch.

## Is CVE-2025-7069 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7069 exists.

## Other vulnerabilities in Hdfgroup Hdf5

- [CVE-2024-32608](https://insights.sbomify.com/CVE-2024-32608/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-29157](https://insights.sbomify.com/CVE-2024-29157/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-29159](https://insights.sbomify.com/CVE-2024-29159/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-29164](https://insights.sbomify.com/CVE-2024-29164/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-32611](https://insights.sbomify.com/CVE-2024-32611/): Other in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7069 and fix it if it is affected.

What it is: CVE-2025-7069 is a medium-severity memory corruption vulnerability in Hdfgroup Hdf5, published on 4 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7069 exists.

Affected product: Hdfgroup Hdf5. 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-2025-7069/ (Markdown: https://insights.sbomify.com/CVE-2025-7069/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7069
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7069
- OSV: https://osv.dev/vulnerability/CVE-2025-7069

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7069/
Summaries are generated and may contain mistakes; the official description above is the record.