CVE-2026-17573

MEDIUM

Double Free in H5D__chunk_copy() in HDF5 via a Crafted Chunk-Index Size Field

Title source: cna

Description

A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free.

References (1)

Core 1

Core References

https://github.com/HDFGroup/hdf5/issues/6124

Scores

CVSS v4 4.0

EPSS 0.0012

EPSS Percentile 2.0%

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-415

Status published

Products (1)

The HDF Group/HDF5 <= 2.1.1

Published Jul 27, 2026

Tracked Since Jul 27, 2026