Description
NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.
Published: 2026-08-05
Score: 8.2 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
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Remediation

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History

Wed, 05 Aug 2026 22:45:00 +0000

Type Values Removed Values Added
Description NULL pointer dereference in H5Pget_fill_value in HDF5 before 2.1.1 allows attackers to cause a denial of service via a dataset whose version 1 or 2 fill value message has the "defined" flag set together with a negative size field, which is not normalized to the library's "undefined" sentinel and reaches H5T_path_find with a NULL datatype.
Title HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message
Weaknesses CWE-476
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H'}

Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: HDFG

Published:

Updated: 2026-08-05T22:14:29.792Z

Reserved: 2026-08-05T22:12:47.262Z

Link: CVE-2026-19024

cve-icon Vulnrichment

No data.

cve-icon NVD

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cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-05T23:30:04Z

Weaknesses