libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

• azl3 expat 2.8.2-1 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. Aug 24, 2026 at 8:10 AM UTC
   • Removed affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 python3 3.12.9-14 on Azure Linux 3.0.
   • Added fixed versions: 2.8.3-1.
   • The vendor changed its remediation guidance.
2. Aug 21, 2026 at 7:10 AM UTC
   • Added affected products: azl3 cmake 3.30.3-15 on Azure Linux 3.0, azl3 python3 3.12.9-14 on Azure Linux 3.0.

1. Aug 11, 2026 at 1:08 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Aug 20, 2026 at 6:50 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.

3. Aug 23, 2026 at 2:46 PM 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.