hdf5 v1.14.6 was discovered to contain a heap buffer overflow via the H5VM_memcpyvv function.

• 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

• cbl2 hdf5 1.14.6-2

• cbl2 hdf5 1.14.6-2 on CBL-Mariner 2.0

• azl3 hdf5 1.14.6-1 on Azure Linux 3.0

SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.

1. Oct 27, 2026 at 9:20 AM UTC
   • The vendor changed its remediation guidance.

1. Dec 16, 2025 at 1:01 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 28, 2026 at 11:20 AM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 27, 2026 at 1:46 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Oct 28, 2026 at 3:45 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.