CVE-2026-17574

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

State: Published
Severity: 5.2 Medium
Published: Jul 27, 2026
Updated: Jul 27, 2026
Reserved: Jul 27, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.2 Medium	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:P	HDFG

Weaknesses

CWE-617 Reachable assertion
CWE-476 NULL pointer dereference

Affected Products

Product	Versions
HDF5The HDF Group	<= 2.1.1Affected

References

https://github.com/HDFGroup/hdf5/commit/3fa6ed6e9dfeebbc784e21d8c48e31e35a8042bc

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