LOW 3.3 Microsoft

CVE-2025-6856

HDF5 H5FL.c H5FL__reg_gc_list use after free

Microsoft Security Update 2026-Aug: HDF5 H5FL.c H5FL__reg_gc_list use after free

Affected Products

cbl2 hdf5 1.14.4-1 on CBL Mariner 2.0
azl3 hdf5 1.14.4.3-1 on Azure Linux 3.0
cbl2 hdf5 1.14.4-1

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-6856
https://nvd.nist.gov/vuln/detail/CVE-2025-6856

Published: 2026-08-06 · Source: Microsoft · Feed updated: 2026-08-10

This low severity vulnerability with a CVSS score of 3.3 was published on 2026-08-06 via Microsoft. Affected: cbl2 hdf5 1.14.4-1 on CBL Mariner 2.0, azl3 hdf5 1.14.4.3-1 on Azure Linux 3.0, cbl2 hdf5 1.14.4-1.

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