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HDF5 EUVDEUVD-2026-53660

| CVE-2026-19024 HIGH
NULL Pointer Dereference (CWE-476)
2026-08-05 HDFG GHSA-c7cf-qx8c-5ph7
Null Pointer Dereference Denial Of Service Hdf5 Suse Red Hat
High
Disputed · 8.2 Vendor: HDFG
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Severity by source

Sources disagree (Low–High)
Vendor (HDFG) PRIMARY
8.2 HIGH
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/E:X/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
vuln.today AI
5.5 MEDIUM

Local file-parsing DoS requiring user interaction to open crafted file; no privileges needed, no C/I impact, availability crash is high severity.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
SUSE
3.3 LOW
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Red Hat
5.5 MEDIUM
qualitative

vuln.today treats the vendor’s rating as authoritative. A higher third-party CVSS (e.g. CISA-ADP) is shown for transparency but does not drive the headline severity.

CVSS VectorVendor: HDFG

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/E:X/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
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

2
Analysis Generated
Aug 05, 2026 - 23:06 vuln.today
CVE Published
Aug 05, 2026 - 22:14 cve.org
HIGH 8.2

DescriptionCVE.org

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.

AnalysisAI

NULL pointer dereference in HDF5's H5Pget_fill_value function (all versions before 2.1.1) enables denial of service by processing a specially crafted HDF5 dataset file. The flaw arises when a fill value message (format version 1 or 2) carries the 'defined' flag alongside a negative size field - a malformed state the library fails to normalize to its internal 'undefined' sentinel - allowing a NULL datatype pointer to reach H5T_path_find and crash the process. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft HDF5 file with malformed fill value message
Delivery
Deliver file to target user or ingestion pipeline
Exploit
Victim opens or processes crafted file
Execution
H5Pget_fill_value fails to normalize negative-size 'defined' fill value
Persist
NULL datatype pointer passed to H5T_path_find
Impact
NULL pointer dereference crashes HDF5-consuming process
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Vulnerability AssessmentAI

Exploitation Exploitation requires that a user or automated process open a crafted HDF5 file containing a dataset with a version 1 or 2 fill value message where the 'defined' flag is set and the size field is negative - a malformed combination that bypasses normalization in the HDF5 parsing code. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H) constrains practical risk considerably: local attack vector and passive user interaction (UI:P) mean an attacker cannot trigger this remotely against default deployments without first delivering a malicious file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious HDF5 file in which a dataset's fill value message (format version 1 or 2) has the 'defined' flag set with a negative size field. When a researcher, automated pipeline, or web service opens this file using an unpatched HDF5 library, H5Pget_fill_value passes a NULL datatype pointer to H5T_path_find, immediately crashing the consuming process. …
Remediation The primary fix is upgrading to HDF5 2.1.1 or later, which correctly normalizes malformed fill value messages before they reach H5T_path_find. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Immediately within 24 hours, identify all HDF5 installations across your infrastructure and document which systems process external, user-supplied, or untrusted HDF5 data files; simultaneously alert applicable teams of the availability risk. …

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Same weakness CWE-476 – NULL Pointer Dereference

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Same technique Null Pointer Dereference

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CVE-2016-0742 HIGH
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CVE-2014-3470 MEDIUM
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Vendor StatusVendor

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Module for Package Hub 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 SP5 Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Affected
SUSE Linux Enterprise Module for HPC 12 Affected

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EUVD-2026-53660 vulnerability details – vuln.today
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