HDF5: H5T__conv_struct Use After Free_CVE-2026-34734

7.8 / 10

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-34734

Source GitHub_M

Published Apr 9, 2026 at 19:01

Affected Product

Vendor HDFGroup

Product hdf5

Version <= 1.14.1-2

Affected Versions HDFGroup hdf5 <= 1.14.1-2

CWE Classification

CWE-416

References

github.com /HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj

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    "published": "2026-04-09T19:01:21.794Z",
    "modified": "2026-04-09T19:01:21.794Z",
    "type": "cve",
    "title": "HDF5: H5T__conv_struct Use After Free",
    "source": "GitHub_M",
    "references": "https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj",
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