CVE-2026-19028: HDF5 <=2.3.0

Affected technology

HDF5 · <=2.3.0
The HDF Group

Description’s affected range: prior to 2.3.0 computes the data length to checksum by subtracting the 4-byte trailing checksum size from the input buffer size without checking that the buffer is at least 4 bytes

Component: Not specified by the source

Attack conditions (Source advisory, CVSS 4.0): Local · No privileges required · Passive user interaction

What an attacker can do

The source reports that an attacker could disrupt service. Source advisory’s CVSS 4.0 assessment (base score 6.8/10) rates confidentiality and integrity impact as none; availability impact as high.