Vulnerability · Published Jun 23, 2025 · Assigned by VulDB
CVE-2025-6516HDF5 H5Fint.c H5F_addr_decode_len heap-based overflow
Medium 5.3
In plain English
A medium-severity heap buffer overflow in HDF5. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | hdf5 | no fix listed | DEBIAN-CVE-2025-6516 |
| Debian:13 | hdf5 | no fix listed | DEBIAN-CVE-2025-6516 |
| Debian:14 | hdf5 | 2.1.0+repack-1 | DEBIAN-CVE-2025-6516 |
| Ubuntu:22.04:LTS | hdf5 | no fix listed | UBUNTU-CVE-2025-6516 |
| Ubuntu:24.04:LTS | hdf5 | no fix listed | UBUNTU-CVE-2025-6516 |
| Ubuntu:25.10 | hdf5 | no fix listed | UBUNTU-CVE-2025-6516 |
| Ubuntu:26.04:LTS | hdf5 | no fix listed | UBUNTU-CVE-2025-6516 |
| Ubuntu:26.10 | hdf5 | no fix listed | UBUNTU-CVE-2025-6516 |
Affected products (as reported)
Weakness: CWE-122, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-313636 | HDF5 H5Fint.c H5F_addr_decode_len heap-based overflow vdb-entry, technical-description
- VDB-313636 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #592589 | HDF5 1.14.6 Heap-based Buffer Overflow third-party-advisory
- https://github.com/HDFGroup/hdf5/issues/5581 issue-tracking
- https://github.com/user-attachments/files/20626851/reproduce.tar.gz exploit