CVE-2026-17573 PUBLISHED

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

Assigner: HDFG
Reserved: 27.07.2026 Published: 27.07.2026 Updated: 27.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	The HDF Group
Product	HDF5
Versions	Default: unaffected Version <= 2.1.1 is affected

References

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

Problem Types

CWE-415 Double free CWE