CVE-2017-12837: Heap-based buffer overflow in the S_regatom function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x be...

Security readout for executives and security teams

This is a Perl regular-expression parsing bug that can crash affected software if it processes a specially crafted regex. Business risk is mainly service disruption where applications accept or generate untrusted regex patterns. The source bundle does not show known active exploitation. Exposure is most likely on systems running the affected Perl versions, particularly services that compile attacker-controlled regular expressions. Downstream products may embed or package Perl, so verify against vendor advisories rather than assuming only standalone Perl installations are affected. Treat as a targeted reliability risk, not an emergency breach signal. Patch through normal vulnerability management, accelerating for exposed services that accept user-controlled regex input or rely on embedded Perl in vendor products. Mitigation focus: Upgrade Perl using vendor-supported packages or releases containing the referenced fixes.; Check Debian, Oracle, NetApp, Red Hat, and Perl guidance for affected downstream products.; Avoid compiling user-supplied regular expressions unless strictly required..

Prepared

Jun 12, 2026, 20:56 UTC (UTC+00:00)

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