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

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-28 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

HDF5: before 1.14.6 — fixed in 1.14.6

How to fix

Upgrade to a fixed version: HDF5 1.14.6. Check the vendor advisory for mitigations.

References

https://github.com/HDFGroup/hdf5/issues/5381
https://vuldb.com/?ctiid.301898
https://vuldb.com/?id.301898
https://vuldb.com/?submit.521151

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