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Vulnerability record · CVE-2015-3217 · published 13 December 2016

CVE-2015-3217: Pcre2 memory buffer overflow vulnerability

Pcre · Pcre2

PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

7.5 CVSS 3.0 High EPSS 6.2% · top 6.8% CWE-119 · Memory buffer overflow
7.5CVSS 3.0 base score, v2 5.0
6.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
20References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://rhn.redhat.com/errata/RHSA-2016-1025.html
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://vcs.pcre.org/pcre?view=revision&revision=1566 Patch
http://www-01.ibm.com/support/docview.wss?uid=isg3T1023886 Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/06/03/7 Mailing List
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/75018 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2016:1132
https://bugs.exim.org/show_bug.cgi?id=1638 ExploitIssue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1228283 Issue Tracking
http://rhn.redhat.com/errata/RHSA-2016-1025.html
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://vcs.pcre.org/pcre?view=revision&revision=1566 Patch
http://www-01.ibm.com/support/docview.wss?uid=isg3T1023886 Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/06/03/7 Mailing List
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/75018 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2016:1132
https://bugs.exim.org/show_bug.cgi?id=1638 ExploitIssue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1228283 Issue Tracking

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-8786Pcre2 memory buffer overflow vulnerabilitypcre2test.c in PCRE2 10.23 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impac…EPSS 4.1%9.8CVE-2017-8399Pcre2 memory buffer overflow vulnerabilityPCRE2 before 10.30 has an out-of-bounds write caused by a stack-based buffer overflow in pcre2_match.c, related to a "pattern with very many captures…EPSS 3.1%9.8CVE-2015-3210Pcre2 out-of-bounds write vulnerabilityHeap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code via a crafted regular expressi…EPSS 9.2%9.8CVE-2016-3191Pcre memory buffer overflow vulnerabilityThe compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*A…EPSS 8.4%9.8CVE-2016-1283Pcre memory buffer overflow vulnerabilityThe pcre_compile2 function in pcre_compile.c in PCRE 8.38 mishandles the /((?:F?+(?:^(?(R)a+\"){99}-))(?J)(?'R'(?'R'<((?'RR'(?'R'\){97)?J)?J)(?'R'(?'…EPSS 7.8%9.8CVE-2015-8391Pcre memory buffer overflow vulnerabilityThe pcre_compile function in pcre_compile.c in PCRE before 8.38 mishandles certain [: nesting, which allows remote attackers to cause a denial of ser…EPSS 6.4%9.1CVE-2022-1586Pcre2 out-of-bounds read vulnerabilityAn out-of-bounds read vulnerability was discovered in the PCRE2 library in the compile_xclass_matchingpath() function of the pcre2_jit_compile.c file…EPSS 3.4%9.1CVE-2022-1587Pcre2 out-of-bounds read vulnerabilityAn out-of-bounds read vulnerability was discovered in the PCRE2 library in the get_recurse_data_length() function of the pcre2_jit_compile.c file. Th…EPSS 2.8%

Source: NIST National Vulnerability Database (record CVE-2015-3217), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.