CVE-2025-2309: HDF5 Type Conversion Logic H5T__bit_copy 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: 2025-03-14 · updated 2026-06-17
Weakness: CWE-119

Description

A vulnerability has been found in HDF5 1.14.6 and classified as critical. This vulnerability affects the function H5T__bit_copy of the component Type Conversion Logic. The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The vendor plans to fix this issue in an upcoming release.

Affected products

HDF5: 1.14.6

References

https://github.com/madao123123/crash_report/blob/main/hdf5_poc/hdf5_poc3.md
https://vuldb.com/?ctiid.299722
https://vuldb.com/?id.299722
https://vuldb.com/?submit.514532

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