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CVE-2026-17574

NULL Pointer Dereference in HDF5 via Invalid Variable-Length Datatype Type Tag

MEDIUM
5.5
CVSS Score
Published: July 27, 2026 at 03:12 PM UTC
Updated: October 24, 2026 at 01:10 PM UTC
2 products affected across 2 vendorsHDF5HDF5

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

HDF5 contains a NULL pointer dereference vulnerability. Processing a crafted HDF5 file containing an attribute with an invalid variable-length datatype type field may cause the application to crash when the attribute is read.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

HDF5· Hdfgroup
95%
v < 2.1.1
Affected range stops below 2.1.1, so it looks safe — our inference, not a vendor statement
HDF5· Hdf
90%
<= 2.1.1

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Patch
Source: cverecord
https://github.com/HDFGroup/hdf5/commit/3fa6ed6e9dfeebbc784e21d8c48e31e35a8042bc

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-617CWE-476

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