CVE-2026-34734

HDF5: H5T__conv_struct Use After Free

CVSS 7.8 HIGHEPSS 0.2%CWE-416 CWE-825

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 7.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

09 abr 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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

Productos afectados

HDFGroup · hdf5

Referencias

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 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34734.json