CVE-2026-17573

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

Published Jul 27, 2026 CVSS 4.0 · 4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 5.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
Weaknesses CWE-763
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.0, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Type Values Removed Values Added
First Time appeared Hdfgroup
Hdfgroup hdf5
Vendors & Products Hdfgroup
Hdfgroup hdf5
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Double Free in H5D__chunk_copy() in HDF5 via a Crafted Chunk-Index Size Field
Weaknesses CWE-415
References
Metrics cvssV4_0

{'score': 4, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
HDFG
Published
Updated
Jul 27, 2026, 5:27 PM
Reserved
Jul 27, 2026, 3:07 PM
Status
Analyzed
Published
Jul 27, 2026, 4:17 PM
Modified
Oct 24, 2026, 1:10 PM
Severity
Moderate
Public date
Jul 27, 2026, 3:11 PM