PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references,…

Description

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Scores

EPSS (exploitation in 30 days)

4.0% · top 9.3% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-119 (opens in a new tab)All about CWE-119 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• [oss-security] 20151128 Re: Heap Overflow in PCRE (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://www.fortiguard.com/advisory/FG-VD-15-010/ (opens in a new tab)x_refsource_MISCx_transferred
• 74924 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• RHSA-2016:2750 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• https://bugs.exim.org/show_bug.cgi?id=1503 (opens in a new tab)x_refsource_CONFIRMx_transferred
• https://jira.mongodb.org/browse/SERVER-17252 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2015-2327](https://trackcve.app/badge/CVE-2015-2327.svg)](https://trackcve.app/cve/CVE-2015-2327)

Record last updated 6 Aug 2024, 05:10 UTC.