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TI-2015-02052 Aliases CVE-2015-2327GHSA-hvfc-r626-888m

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

Priority MEDIUM 40CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
Partial Red Hat: 15 fixed, 4 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.04049 90th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 15 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*up to 8.35VulnerablePCRE
  • cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:* Versions up to 8.35 Vulnerable ·PCRE

Remediation

Red Hat 1 advisory

  • RHSA-2016:2750 Released 2016-11-15 · Red Hat rating Moderate
    rh-php56 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-php56-2.3-1.el6, rh-php56-php-5.6.25-1.el6, rh-php56-php-bcmath-5.6.25-1.el6 +30
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-php56-2.3-1.el7, rh-php56-php-5.6.25-1.el7, rh-php56-php-bcmath-5.6.25-1.el7 +28

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 3AffectedNo fix planned: Will not fix
Red Hat Software CollectionsAffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed—
Red Hat Enterprise Linux Client Optional (v. 7)Fixed—
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed—
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed—
Red Hat Enterprise Linux Server (v. 7)Fixed—
Red Hat Enterprise Linux Server Optional (v. 7)Fixed—
Red Hat Enterprise Linux Workstation (v. 7)Fixed—
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed—
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:2750
Not affected: 7 products
  • Red Hat Directory Server 8
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat JBoss Enterprise Web Server 1
  • Red Hat JBoss Enterprise Web Server 2
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-2327
  2. 2026-10-03 Alias added: GHSA-hvfc-r626-888m

References

Exploit 2

Advisory 1

Other 3

  • TI-2015-06906 PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually… CVSS 3.1CRITICAL 9.8
  • TI-2015-06903 PCRE before 8.38 mishandles certain repeated conditional groups, which allows remote… CVSS 3.1CRITICAL 9.8
  • TI-2015-06914 PCRE before 8.38 mishandles the (?(<digits>) and (?(R<digits>) conditions, which allows… CVSS 3.1CRITICAL 9.8
  • TI-2015-06910 PCRE before 8.38 mishandles the [: and \\ substrings in character classes, which allows… CVSS 3.1CRITICAL 9.8
  • TI-2015-06909 PCRE before 8.38 mishandles the /(?:|a|){100}x/ pattern and related patterns, which… CVSS 3.1CRITICAL 9.8
  • TI-2015-06908 PCRE before 8.38 mishandles the /(?=di(?<=(?1))|(?=(.))))/ pattern and related patterns… CVSS 2.0HIGH 7.5
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences