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Vulnerability record · CVE-2015-2326 · published 14 January 2020

CVE-2015-2326: Pcre out-of-bounds read vulnerability

Pcre · Pcre

The pcre_compile2 function in PCRE before 8.37 allows context-dependent attackers to compile incorrect code and cause a denial of service (out-of-bounds read) via regular expression with a group containing both a forward referencing subroutine call and a recursive back reference, as demonstrated by "((?+1)(\1))/".

5.5 CVSS 3.1 Medium EPSS 1.6% · top 25.3% CWE-125 · Out-of-bounds read
5.5CVSS 3.1 base score, v2 4.3
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The pcre_compile2 function in PCRE before 8.37 allows context-dependent attackers to compile incorrect code and cause a denial of service (out-of-bounds read) via regular expression with a group containing both a forward referencing subroutine call and a recursive back reference, as demonstrated by "((?+1)(\1))/".

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

Affected products

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

References

LinkTags
http://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html Mailing ListThird Party Advisory
https://bugs.exim.org/show_bug.cgi?id=1592 ExploitIssue TrackingPermissions RequiredThird Party Advisory
https://fortiguard.com/zeroday/FG-VD-15-016 Third Party Advisory
https://www.pcre.org/original/changelog.txt Release NotesThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html Mailing ListThird Party Advisory
https://bugs.exim.org/show_bug.cgi?id=1592 ExploitIssue TrackingPermissions RequiredThird Party Advisory
https://fortiguard.com/zeroday/FG-VD-15-016 Third Party Advisory
https://www.pcre.org/original/changelog.txt Release NotesThird Party Advisory

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

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Source: NIST National Vulnerability Database (record CVE-2015-2326), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.