CVE-2015-8853: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 2.6% chance of exploitation in the next 30 days.

The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."

Affected products

• Fedoraproject Fedora: version 22 only
• Perl Perl: up to and including 5.23.9

Published 2016-05-25. Last modified 2026-06-17.