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TI-2015-06906 Aliases CVE-2015-8386GHSA-x66w-7mq7-3gxp

PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually…

Priority MEDIUM 52CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 17 fixed, 8 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-119 and the CVSS impact.

Summary

PCRE before 8.38 mishandles the interaction of lookbehind assertions and mutually recursive subpatterns, which allows remote attackers to cause a denial of service (buffer overflow) 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 0.0687 94th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 17 fixed, 8 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 · 4

CPEVersionsRoleVendor
cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*up to 8.37VulnerablePCRE
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*22VulnerableFedoraproject
cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*7VulnerableOracle
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*5.5.0 to before 5.5.32; 5.6.0 to before 5.6.18; 7.0.0 to before 7.0.3VulnerablePHP
  • cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:* Versions up to 8.37 Vulnerable ·PCRE
  • cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* Versions 22 Vulnerable ·Fedoraproject
  • cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:* Versions 7 Vulnerable ·Oracle
  • cpe:2.3:a:php:php:*:*:*:*:*:*:*:* Versions 5.5.0 to before 5.5.32; 5.6.0 to before 5.6.18; 7.0.0 to before 7.0.3 Vulnerable ·PHP

Remediation

Red Hat 3 advisories

  • 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
  • RHSA-2016:1132 Released 2016-05-26 · Red Hat rating Important
    rh-mariadb100-mariadb security update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-mariadb100-mariadb-1:10.0.25-4.el6, rh-mariadb100-mariadb-bench-1:10.0.25-4.el6, rh-mariadb100-mariadb-common-1:10.0.25-4.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-mariadb100-mariadb-1:10.0.25-4.el7, rh-mariadb100-mariadb-bench-1:10.0.25-4.el7, rh-mariadb100-mariadb-common-1:10.0.25-4.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6) rh-mariadb100-mariadb-1:10.0.25-4.el6, rh-mariadb100-mariadb-bench-1:10.0.25-4.el6, rh-mariadb100-mariadb-common-1:10.0.25-4.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) rh-mariadb100-mariadb-1:10.0.25-4.el6, rh-mariadb100-mariadb-bench-1:10.0.25-4.el6, rh-mariadb100-mariadb-common-1:10.0.25-4.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1) rh-mariadb100-mariadb-1:10.0.25-4.el7, rh-mariadb100-mariadb-bench-1:10.0.25-4.el7, rh-mariadb100-mariadb-common-1:10.0.25-4.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2) rh-mariadb100-mariadb-1:10.0.25-4.el7, rh-mariadb100-mariadb-bench-1:10.0.25-4.el7, rh-mariadb100-mariadb-common-1:10.0.25-4.el7 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-mariadb100-mariadb-1:10.0.25-4.el6, rh-mariadb100-mariadb-bench-1:10.0.25-4.el6, rh-mariadb100-mariadb-common-1:10.0.25-4.el6 +6
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-mariadb100-mariadb-1:10.0.25-4.el7, rh-mariadb100-mariadb-bench-1:10.0.25-4.el7, rh-mariadb100-mariadb-common-1:10.0.25-4.el7 +6
  • RHSA-2016:1025 Released 2016-05-11 · Red Hat rating Important
    pcre security update
    • Red Hat Enterprise Linux Client (v. 7) pcre-8.32-15.el7_2.1
    • Red Hat Enterprise Linux Client Optional (v. 7) pcre-devel-8.32-15.el7_2.1, pcre-static-8.32-15.el7_2.1, pcre-tools-8.32-15.el7_2.1
    • Red Hat Enterprise Linux ComputeNode (v. 7) pcre-8.32-15.el7_2.1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) pcre-devel-8.32-15.el7_2.1, pcre-static-8.32-15.el7_2.1, pcre-tools-8.32-15.el7_2.1
    • Red Hat Enterprise Linux Server (v. 7) pcre-8.32-15.el7_2.1, pcre-8.32-15.el7_2.1.ppc, pcre-devel-8.32-15.el7_2.1 +1
    • Red Hat Enterprise Linux Server Optional (v. 7) pcre-static-8.32-15.el7_2.1, pcre-static-8.32-15.el7_2.1.ppc, pcre-tools-8.32-15.el7_2.1
    • Red Hat Enterprise Linux Workstation (v. 7) pcre-8.32-15.el7_2.1, pcre-devel-8.32-15.el7_2.1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) pcre-static-8.32-15.el7_2.1, pcre-tools-8.32-15.el7_2.1

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Directory Server 8AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not 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 1AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 2AffectedNo 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 RHSA-2016:1025
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1025
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2016:1025
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2016:1132, RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2016:1132, RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.6)Fixed RHSA-2016:1132
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2016:1132, RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.1)Fixed RHSA-2016:1132
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.2)Fixed RHSA-2016:1132, 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-2016:1132, RHSA-2016:2750
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2016:1132, RHSA-2016:2750
Not affected: 1 product
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-8386
  2. 2026-10-03 Alias added: GHSA-x66w-7mq7-3gxp

References

Advisory 10

Other 2

Sources

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