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CVE-2015-8387

20
FAUCET Score

CVE-2015-8387 is an integer overflow vulnerability in PCRE versions prior to 8.38, affecting products like Fedora, PHP, and other applications utilizing PCRE. This flaw arises from improper handling of specific subroutine calls within regular expressions, allowing remote attackers to trigger a denial of service or potentially other unspecified impacts. With a CVSS score of 7.3 (High), it can be exploited over a network with low attack complexity and no user interaction, leading to low confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.37CPE matchmatch criteria
cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*
22CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*
>= 5.5.0, < 5.5.32CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 5.6.0, < 5.6.18CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.3CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.64%
Probability of exploitation in next 30 days
EPSS Percentile
88.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0364 is in the 79th 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

Vendor Patches (14)

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
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-mariadb100-mariadb
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php56-php
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 1Fixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat JBoss Enterprise Web Server 2Fixed in: httpd
redhatend of lifevia redhat_api
Product: Red Hat Directory Server 8Fixed in: pcre
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: pcre
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: glib2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: pcre
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: glib2
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: pcre
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: virtuoso-opensource

Vendor Advisories (1)

redhatCVE-2015-8387

pcre: Integer overflow in subroutine calls (8.38/8)

Nov 23, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2016-January/174931.html
Third Party Advisory
bto.bluecoat.com / security-advisory/sa128
Third Party Advisory
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
security.gentoo.org / glsa/201607-02
Third Party Advisory
security.netapp.com / advisory/ntap-20230216-0002
vcs.pcre.org / pcre/code/trunk/ChangeLog
Broken LinkRelease Notes
openwall.com / lists/oss-security/2015/11/29/1
Mailing ListThird Party Advisory
securityfocus.com / bid/82990
Third Party AdvisoryVDB Entry