CVE-2015-2328

21

FAUCET Score

CVE-2015-2328 describes a denial-of-service vulnerability in PCRE before version 8.36, affecting products like Oracle Linux and generic PCRE implementations. The flaw stems from improper handling of specific recursive regular expression patterns, such as /((?(R)a|(?1)))+/, which can lead to a segmentation fault. With a CVSS score of 7.5, this vulnerability is rated as high severity, allowing unauthenticated remote attackers to cause a denial of service with low attack complexity. The potential impact extends to confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. The vulnerability has received minimal community discussion and media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		7CPE matchmatch criteria	cpe:2.3:o:oracle:linux:7:::::::*
		<= 8.35CPE matchmatch criteria	cpe:2.3:a:pcre:pcre::::::::

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Exploitability Score

10.0

Impact Score

6.4

CvssVersion

2.0

Exploit Intelligence

EPSS Score

5.24%

Probability of exploitation in next 30 days

EPSS Percentile

91.7%

Percentile rank of EPSS score among Peer Group

As of 2026-07-28

Model: v2026.06.15

This CVE's current EPSS score of 0.0524 is in the 85th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (20)

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: pcre-0:8.32-15.el7_2.1

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-php56-0:2.3-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-php56-php-0:5.6.25-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-php56-php-pear-1:1.9.5-4.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-php56-0:2.3-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-php56-php-0:5.6.25-1.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUSFixed in: rh-php56-php-pear-1:1.9.5-4.el6

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php56-0:2.3-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php56-php-0:5.6.25-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php56-php-pear-1:1.9.5-4.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-php56-0:2.3-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-php56-php-0:5.6.25-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUSFixed in: rh-php56-php-pear-1:1.9.5-4.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-php56-0:2.3-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-php56-php-0:5.6.25-1.el7

redhatpatch availablevia redhat_api

Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUSFixed in: rh-php56-php-pear-1:1.9.5-4.el7

redhatend of lifevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: glib2

redhatend of lifevia redhat_api

Product: Red Hat JBoss Enterprise Web Server 3Fixed in: pcre

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: php54-php

redhatend of lifevia redhat_api

Product: Red Hat Software CollectionsFixed in: php55-php

Vendor Advisories (1)

redhatCVE-2015-2328Moderate

pcre: infinite recursion compiling pattern with recursive reference in a group with indefinite repeat (8.36/20)

References

rhn.redhat.com / errata/RHSA-2016-1025.html

rhn.redhat.com / errata/RHSA-2016-2750.html

bugs.exim.org / show_bug.cgi

Exploit

jira.mongodb.org / browse/SERVER-17252

Third Party Advisory

vcs.pcre.org / pcre/code/trunk/ChangeLog

Exploit

www-01.ibm.com / support/docview.wss

fortiguard.com / advisory/FG-VD-15-014

Third Party Advisory

openwall.com / lists/oss-security/2015/11/29/1

Third Party Advisory

oracle.com / technetwork/topics/security/linuxbulletinapr2016-2952096.html

Third Party Advisory

securityfocus.com / bid/74924