VULNERABILITY INTELLIGENCE

CVE-2026-34734

CVSS score7.8 HIGH
EPSS probability0.19%
CISA KEVNot currently listed
Published2026-04-09
Last modified2026-10-26
CVSS vectorCVSS: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.

Weakness classification

  • security-advisories@github.com: CWE-416
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-825

Primary references