PT-2026-31703 · Hdf5+1 · Hdf5+1

Denandz · Published 2026-04-09 · Updated 2026-05-12 · CVE-2026-34734

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions HDF5 versions 1.14.1-2 and earlier

Description HDF5 is software for managing data. A heap-use-after-free issue was identified in the h5dump helper utility. An attacker can trigger this by providing a malicious h5 file. The issue occurs because a freed object is referenced in a memmove call from H5T conv struct. The object was allocated by H5D typeinfo init phase3 and freed by H5D typeinfo term.

Recommendations Update to a version later than 1.14.1-2

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-07255

CVE-2026-34734

ECHO-4587-2D95-FBA0

Affected Products

Hdf5

Red Os

References · 13

• 🔥 https://github.com/HDFGroup/hdf5/security/advisories/GHSA-w7v2-9cmr-pwwj · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-34734 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34734 · Security Note
• https://ubuntu.com/security/CVE-2026-34734 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-34734 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34734 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-34734 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07255 · Security Note
• https://redos.red-soft.ru/search/?q=CVE-2026-34734 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-hdf5-cve-2026-34734-8.0 · Note
• https://access.redhat.com/security/cve/cve-2026-34734 · Note
• https://twitter.com/CVEnew/status/2042340071185981645 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti/uyazvimost-hdf5-cve-2026-34734-7.3 · Note