CVE-2007-5116: Larry Wall Perl

High severity, CVSS 7.5. EPSS: 4.8% chance of exploitation in the next 30 days.

Buffer overflow in the polymorphic opcode support in the Regular Expression Engine (regcomp.c) in Perl 5.8 allows context-dependent attackers to execute arbitrary code by switching from byte to Unicode (UTF) characters in a regular expression.

Affected products

• Larry Wall Perl: version 5.8.0 only; version 5.8.1 only; version 5.8.3 only; version 5.8.4 only; version 5.8.4.1 only; version 5.8.4.2 only; …
• Mandrakesoft Mandrake Multi Network Firewall: version 2.0 only
• Openpkg Openpkg: version current only
• Red Hat Enterprise Linux: version 1.0 only

Published 2007-11-07. Last modified 2026-06-16.