CVE-2026-17574 PUBLISHED

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

Assigner: HDFG
Reserved: 27.07.2026 Published: 27.07.2026 Updated: 27.07.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 5.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	Active

CVSS 4.0

Product Status

Vendor	The HDF Group
Product	HDF5
Versions	Default: unaffected Version <= 2.1.1 is affected

References

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

Problem Types

CWE-617 Reachable assertion CWE
CWE-476 NULL pointer dereference CWE