Disclosure summary
Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass
Source-reported weakness categories
CWE-670
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Aug
Open original source · Updated Sep 09, 2026
Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 5.3
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 perl 5.38.2-514 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 perl 5.38.2-516 on Azure Linux 3.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 5.38.2-516 · product IDs 21697-17084
- Vendor guidance · product IDs 21697-17084
- Vendor guidance · build 5.38.2-516 · product IDs 21848-17084
- Vendor guidance · product IDs 21848-17084
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-08-23T11:03:46-04:00
MODIFIED 2026-09-09T23:33:02-04:00
INGESTED 2026-10-08T12:35:08-04:00