# CVE-2024-32621: Memory corruption in n/a

> A heap-based buffer overflow in the HDF5 library allows attackers to corrupt the instruction pointer, potentially leading to code execution or denial of service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 May 2024
- **Updated:** 13 Feb 2025
- **Also known as:** AZL-40561, AZL-40642, DEBIAN-CVE-2024-32621, ECHO-e887-dfa2-d508, GHSA-3mcf-4rgf-4fx9, JLSEC-2026-316, ROOT-OS-DEBIAN-11-CVE-2024-32621, ROOT-OS-DEBIAN-12-CVE-2024-32621, UBUNTU-CVE-2024-32621

## What is CVE-2024-32621?

CVE-2024-32621 is a critical memory corruption vulnerability in Hdfgroup Hdf5, published on 9 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

HDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5HG_read in H5HG.c (called from H5VL__native_blob_get in H5VLnative_blob.c), resulting in the corruption of the instruction pointer.

Weakness: CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2024-32621?

It affects 1 product.


Products: Hdfgroup Hdf5.

## How do I fix CVE-2024-32621?

Upgrade to a fixed version.

## Is CVE-2024-32621 being exploited?

There is no known exploitation of CVE-2024-32621 in the wild and no public exploit code.

## 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-2024-32621 and fix it if it is affected.

What it is: CVE-2024-32621 is a critical memory corruption vulnerability in Hdfgroup Hdf5, published on 9 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-32621 in the wild and no public exploit code.

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-2024-32621/ (Markdown: https://insights.sbomify.com/CVE-2024-32621/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-32621
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-32621
- OSV: https://osv.dev/vulnerability/CVE-2024-32621

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-32621/
Summaries are generated and may contain mistakes; the official description above is the record.