CVE-2026-19024 - Vulnerability Details - OpenCVE

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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

No data.

No data.

No data.

References

Link	Providers
https://github.com/HDFGroup/hdf5/issues/6487

History

Thu, 06 Aug 2026 15:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

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		https://github.com/HDFGroup/hdf5/issues/6487
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'}`

MITRE

Status: PUBLISHED

Assigner: HDFG

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

Updated: 2026-08-06T15:16:14.608Z

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

Link: CVE-2026-19024

Vulnrichment

Updated: 2026-08-06T14:37:22.954Z

NVD

No data.

Redhat

No data.

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