CVE-2025-6818: Hdfgroup HDF5

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability, which was classified as problematic, was found in HDF5 1.14.6. Affected is the function H5O__chunk_protect of the file /src/H5Ochunk.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.

Affected products

• Hdfgroup HDF5: version 1.14.6 only

Published 2025-06-28. Last modified 2026-06-17.