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CVE-2015-8394

27
FAUCET Score

CVE-2015-8394 describes an integer overflow vulnerability in PCRE before version 8.38, affecting products like PHP and Konqueror, due to mishandling of specific regular expression conditions. This critical vulnerability, with a CVSS score of 9.8, allows remote attackers to cause a denial of service and potentially other unspecified impacts through crafted regular expressions. Despite its high severity and ease of exploitation (network attack, low complexity), there is no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.37CPE matchmatch criteria
cpe:2.3:a:pcre:perl_compatible_regular_expression_library:*:*:*:*:*:*:*:*
>= 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

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.81%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0481 is in the 85th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (14)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: virtuoso-opensource
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 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 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

Vendor Advisories (1)

redhatCVE-2015-8394

pcre: Integer overflow caused by missing check for certain conditions (8.38/31)

Nov 23, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2016-January/174931.html
Mailing ListThird Party Advisory
bto.bluecoat.com / security-advisory/sa128
Permissions RequiredThird 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 Link
openwall.com / lists/oss-security/2015/11/29/1
Mailing ListThird Party Advisory
securityfocus.com / bid/82990
Third Party AdvisoryVDB Entry