Expat through 2.8.4 Malformed UTF-16 Acceptance via Unchecked Surrogate

• azl3 expat 2.8.3-2 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 16, 2026 at 11:45 AM UTC
   • Removed affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 python3 3.12.14-2 on Azure Linux 3.0.
   • Removed fixed versions: 3.12.15-1.
2. Oct 7, 2026 at 8:15 AM UTC
   • The vendor changed the advisory's last-updated date.
3. Oct 6, 2026 at 7:55 AM UTC
   • Added fixed versions: 2.8.5-1, 3.12.15-1.
4. Oct 2, 2026 at 12:40 PM UTC
   • Added affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 python3 3.12.14-2 on Azure Linux 3.0.

1. Sep 21, 2026 at 1:01 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Sep 27, 2026 at 11:11 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Oct 16, 2026 at 1:45 AM UTC
   Updated by Microsoft Security Response Center

   The vendor changed the advisory after it was first published.

4. Nov 11, 2026 at 2:20 AM UTC
   Confirmed at the source

   Our collector saw this advisory during a later source check.