CVE-2026-34734

HDF5: H5T__conv_struct Use After Free

Published: Apr 9, 2026Updated: Jul 15, 2026 Sources: CVE List NVD BDUCWE-416

7.8HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-416 CWE-825

Affected Products

Сообщество свободного программного обеспечения

oss-projectaka fsf

Debian GNU/LinuxOn-premOS

Operating Systems / linux-distro

ООО «Ред Софт»

commercial·RUaka red soft

РЕД ОСOn-premOS

Operating Systems / linux-distro

Red Hat Inc.

commercial·USaka red hat

Red Hat Enterprise Linux AIOn-prem

Operating Systems / linux-distro

The HDF Group

oss-projectaka hdf group, hdf5

HDF5LibraryLibrary

OSS Libraries / generic-library

HDFGroup

oss-project·USaka hdf5

hdf5LibraryLibrary

Databases

and 1 more affected products View all →

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

View detailed technique mapping

References

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

github.com

https://redos.red-soft.ru/search/?q=CVE-2026-34734

redos.red-soft.ru

https://access.redhat.com/security/cve/cve-2026-34734

access.redhat.com

and 5 more references View all →

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