CVE-2025-6269: HDF5 H5Cimage.c H5C__reconstruct_cache_entry heap-based overflow

Severity: medium (CVSS 5.3 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: 2025-06-19 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability classified as critical was found in HDF5 up to 1.14.6. Affected by this vulnerability is the function H5C__reconstruct_cache_entry of the file H5Cimage.c. The manipulation 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: through 1.14.6

References

https://github.com/HDFGroup/hdf5/issues/5579
https://github.com/user-attachments/files/20626503/reproduce.tar.gz
https://vuldb.com/?ctiid.313273
https://vuldb.com/?id.313273
https://vuldb.com/?submit.592587
https://github.com/HDFGroup/hdf5/issues/5579

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