CVE-2015-8381

The compile_regex function in pcre_compile.c in PCRE before 8.38 and pcre2_compile.c in PCRE2 before 10.2x mishandles the /(?J:(?|(:(?|(?'R')(\k'R')|((?'R')))H'Rk'Rf)|s(?'R'))))/ and /(?J:(?|(:(?|(?'R')(\z(?|(?'R')(\k'R')|((?'R')))k'R')|((?'R')))H'Ak'Rf)|s(?'R')))/ patterns, and related patterns with certain group references, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

• CWE-119

• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markupExploit, Release Notes
• http://www.openwall.com/lists/oss-security/2015/11/29/1Mailing List, Third Party Advisory
• http://www.securityfocus.com/bid/76187Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2016:1132
• https://bto.bluecoat.com/security-advisory/sa128Third Party Advisory
• https://bugs.exim.org/show_bug.cgi?id=1667Exploit
• https://bugs.exim.org/show_bug.cgi?id=1672Exploit
• https://security.gentoo.org/glsa/201607-02
• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markupExploit, Release Notes
• http://www.openwall.com/lists/oss-security/2015/11/29/1Mailing List, Third Party Advisory
• http://www.securityfocus.com/bid/76187Third Party Advisory, VDB Entry
• https://access.redhat.com/errata/RHSA-2016:1132
• https://bto.bluecoat.com/security-advisory/sa128Third Party Advisory
• https://bugs.exim.org/show_bug.cgi?id=1667Exploit
• https://bugs.exim.org/show_bug.cgi?id=1672Exploit
• https://security.gentoo.org/glsa/201607-02

Published

Dec 2, 2015

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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