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CVE-2026-34734

HIGH CVSS: 7.8 Published: 2026-04-09 Modified: 2026-07-15

Description

HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from H5T__conv_struct. The original object was allocated by H5D__typeinfo_init_phase3 and freed by H5D__typeinfo_term.

Affected Platforms

Hdfgroup Hdf5

Weakness Type

CWE-416, CWE-825

References