CVE-2015-8853: The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow...

Security readout for executives and security teams

This issue can make vulnerable Perl regex processing hang indefinitely when handling malformed UTF-8 data. The business impact is denial of service: affected services could consume CPU and become slow or unavailable if they process attacker-controlled text through vulnerable Perl versions. Exposure is most likely where Perl before 5.24.0, or unpatched vendor Perl packages, process untrusted UTF-8 text with regular expressions. The bundle does not identify specific applications beyond Perl and vendor-distributed packages. Treat as a patching and exposure-management item, not an emergency. Raise priority for public-facing Perl services that process untrusted text, because successful triggering can degrade availability without needing data theft or code execution. Mitigation focus: Update Perl using supported vendor packages or move to Perl 5.24.0 or later.; Prioritize internet-facing services that parse user-supplied text with Perl regular expressions.; Review Gentoo, Ubuntu, Fedora, Red Hat, Oracle, and HPE advisories for platform-specific fixes..

Prepared

Jun 13, 2026, 14:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.