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CVE-2011-1938

47
FAUCET Score

CVE-2011-1938 describes a stack-based buffer overflow in the socket_connect function within PHP versions 5.3.3 through 5.3.6. This flaw could allow attackers to execute arbitrary code by providing an excessively long pathname when connecting to a UNIX socket. The vulnerability carries a CVSS score of 7.5, indicating high severity, and could lead to partial confidentiality, integrity, and availability impacts with low attack complexity. While not listed on CISA's KEV catalog, exploit code is publicly available on ExploitDB, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
5.3.3CPE matchmatch criteria
cpe:2.3:a:php:php:5.3.3:*:*:*:*:*:*:*
5.3.4CPE matchmatch criteria
cpe:2.3:a:php:php:5.3.4:*:*:*:*:*:*:*
5.3.5CPE matchmatch criteria
cpe:2.3:a:php:php:5.3.5:*:*:*:*:*:*:*
5.3.6CPE matchmatch criteria
cpe:2.3:a:php:php:5.3.6:*:*:*:*:*:*:*

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
23.13%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-17486 · Jul 4, 2011
This CVE's current EPSS score of 0.2313 is in the 96th percentile among its peer group of 51,506 CVEs.

Social Chatter

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 (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53-0:5.3.3-1.el5_7.3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php-0:5.3.3-3.el6_1.3
View patch

Vendor Advisories (1)

redhatCVE-2011-1938Low

php: stack-based buffer overflow in socket_connect()

May 23, 2011

References

lists.apple.com / archives/security-announce/2012/Feb/msg00000.html
marc.info
openwall.com / lists/oss-security/2011/05/24/1
Patch
openwall.com / lists/oss-security/2011/05/24/9
Patch
osvdb.org / 72644
securityreason.com / securityalert/8262
securityreason.com / securityalert/8294
exchange.xforce.ibmcloud.com / vulnerabilities/67606
support.apple.com / kb/HT5130
svn.php.net / viewvc/php/php-src/trunk/ext/sockets/sockets.c
Patch
svn.php.net / viewvc
Patch
debian.org / security/2012/dsa-2399
exploit-db.com / exploits/17318
Exploit
mandriva.com / security/advisories
php.net / archive/2011.php
php.net / ChangeLog-5.php
redhat.com / support/errata/RHSA-2011-1423.html
securityfocus.com / bid/49241