# CVE-2025-6516: hdf5: A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical

CVE-2025-6516 is fixed in hdf5 on 1 platform by DEBIAN-CVE-2025-6516 (version 2.1.0+repack-1), released June 23, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-6516
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0039
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 23, 2025

## Description

A vulnerability has been found in HDF5 up to 1.14.6 and classified as critical. This vulnerability affects the function H5F_addr_decode_len of the file /hdf5/src/H5Fint.c. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | hdf5 Debian 14 | 2.1.0+repack-1 | [DEBIAN-CVE-2025-6516](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6516.md) | Jun 23, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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