AZL-92300
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-92300.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-92300
- Upstream
- Published
- 2026-07-13T17:16:48Z
- Modified
- 2026-08-30T05:26:50Z
- Summary
- CVE-2026-13221 affecting package perl for versions less than 5.38.2-514
- Details
-
Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alternation of more than 65535 fixed string branches is compiled into a trie in Perlstudychunk.
When such branches are combined into a trie, the delta between the first branch and the shared tail is stored in a 16-bit field. A branch count above 65535 overflows the field, and the trie's match decision table is truncated with no warning or error.
A pattern of this shape produces false positive matches (matching strings it should not) and false negative matches (failing to match strings it should). When such a pattern gates an access or filtering decision, the result is wrong.
- References