What’s Vulnerable › Vulnerabilities

CVE-2015-2326

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-01-14 · updated 2026-06-17
• Weakness: CWE-125

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))/".

Affected products

• MariaDB: from 10.0.0 before 10.0.18 — fixed in 10.0.18
• Opensuse: 13.1, 13.2
• Pcre: before 8.37 — fixed in 8.37
• PHP: from 5.4.0 before 5.4.41; from 5.5.0 before 5.5.26; from 5.6.0 before 5.6.9 — fixed in 5.4.41, 5.5.26, 5.6.9

How to fix

Upgrade to a fixed version: MariaDB 10.0.18; Pcre 8.37; PHP 5.4.41, 5.5.26, 5.6.9. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html
• https://bugs.exim.org/show_bug.cgi?id=1592
• https://fortiguard.com/zeroday/FG-VD-15-016
• https://www.pcre.org/original/changelog.txt
• http://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html
• https://bugs.exim.org/show_bug.cgi?id=1592
• https://fortiguard.com/zeroday/FG-VD-15-016
• https://www.pcre.org/original/changelog.txt

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