CVE-2025-6516: HDF5 H5Fint.c H5F_addr_decode_len heap-based overflow

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-23 · updated 2026-06-17
Weakness: CWE-119

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 products

HDF5: through 1.14.6

References

https://github.com/HDFGroup/hdf5/issues/5581
https://github.com/user-attachments/files/20626851/reproduce.tar.gz
https://vuldb.com/?ctiid.313636
https://vuldb.com/?id.313636
https://vuldb.com/?submit.592589

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