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Vulnerability record · CVE-2015-8394 · published 2 December 2015

CVE-2015-8394: Pcre perl compatible regular expression library integer overflow vulnerability

Pcre · Perl Compatible Regular Expression Library

PCRE before 8.38 mishandles the (?(<digits>) and (?(R<digits>) conditions, which allows remote attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

9.8 CVSS 3.1 Critical EPSS 4.8% · top 8.3% CWE-190 · Integer overflow
9.8CVSS 3.1 base score, v2 7.5
4.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

PCRE before 8.38 mishandles the (?(<digits>) and (?(R<digits>) conditions, which allows remote attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174931.html Mailing ListThird Party Advisory
http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup Broken Link
http://www.openwall.com/lists/oss-security/2015/11/29/1 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/82990 Third Party AdvisoryVDB Entry
https://bto.bluecoat.com/security-advisory/sa128 Permissions RequiredThird Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731 Third Party Advisory
https://security.gentoo.org/glsa/201607-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0002/
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174931.html Mailing ListThird Party Advisory
http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup Broken Link
http://www.openwall.com/lists/oss-security/2015/11/29/1 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/82990 Third Party AdvisoryVDB Entry
https://bto.bluecoat.com/security-advisory/sa128 Permissions RequiredThird Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731 Third Party Advisory
https://security.gentoo.org/glsa/201607-02 Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0002/

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Source: NIST National Vulnerability Database (record CVE-2015-8394), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.