CVE-2026-34734

HIGH

7.8

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.

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

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

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published4/9/2026

Last Modified4/14/2026

Sourcenvd

Honeypot Sightings0

Affected Products

hdfgroup:hdf5

Weaknesses (CWE)

CWE-416

References

https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj(security-advisories@github.com)

https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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