CVE-2015-8386 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Perl Compatible Regular Expression Library

PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually recursive subpatterns, which allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.