# CVE-2025-2923: HDF5 H5Fint.c H5F_addr_encode_len heap-based overflow

CVE-2025-2923 is fixed in hdf5 on 1 platform by DEBIAN-CVE-2025-2923 (version 2.1.0+repack-1), released March 28, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-2923
- Priority: Routine
- CVSS: 3.3 (Low)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 28, 2025
- Weakness: Heap-based Buffer Overflow
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-2923

## Description

A vulnerability, which was classified as problematic, has been found in HDF5 up to 1.14.6. Affected by this issue is the function H5F_addr_encode_len of the file src/H5Fint.c. The manipulation of the argument pp leads to heap-based buffer overflow. Attacking locally is a requirement. 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-2025-2923](https://patchblox.com/security/data/fix/linux/debian-cve-2025-2923.md) | Mar 28, 2025 |

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