MEDIUM 5.3 Microsoft
CVE-2025-2309
HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow
Microsoft Security Update 2026-Aug: HDF5 Type Conversion Logic H5T__bit_copy heap-based overflow
Affected Products
- cbl2 hdf5 1.14.4-1 on CBL Mariner 2.0
- cbl2 hdf5 1.14.6-1 on CBL Mariner 2.0
- azl3 hdf5 1.14.6-2 on Azure Linux 3.0
- cbl2 hdf5 1.14.6-2 on CBL Mariner 2.0
- azl3 hdf5 1.14.6-4 on Azure Linux 3.0
- azl3 hdf5 1.14.4.3-1 on Azure Linux 3.0
- azl3 hdf5 1.14.6-1 on Azure Linux 3.0
- cbl2 hdf5 1.14.6-2
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-2309
- https://nvd.nist.gov/vuln/detail/CVE-2025-2309
This medium severity vulnerability with a CVSS score of 5.3 was published on 2026-08-06 via Microsoft. Affected: cbl2 hdf5 1.14.4-1 on CBL Mariner 2.0, cbl2 hdf5 1.14.6-1 on CBL Mariner 2.0, azl3 hdf5 1.14.6-2 on Azure Linux 3.0 and 5 more.
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