CVE-2026-34734

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj	Exploit Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-34734
https://bugzilla.redhat.com/show_bug.cgi?id=2457034
https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj	Exploit Vendor Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34734.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-04-09 20:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-34734

Mitre link : CVE-2026-34734

CVE.ORG link : CVE-2026-34734

JSON object : View

Products Affected

hdfgroup

hdf5

CWE

CWE-416

Use After Free

CWE-825

Expired Pointer Dereference

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