Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch

• azl3 perl 5.38.2-514 on Azure Linux 3.0

• azl3 perl 5.38.2-516 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. Sep 27, 2026 at 11:11 PM UTC
   • Added affected products: azl3 perl 5.38.2-516 on Azure Linux 3.0.
   • Added fixed versions: 5.38.2-516.
2. Aug 21, 2026 at 7:10 AM UTC
   • Added fixed versions: 5.38.2-515.
   • The vendor changed its remediation guidance.

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. Sep 10, 2026 at 3:31 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.