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Vulnerability record · CVE-2016-5093 · published 7 August 2016

CVE-2016-5093: Php out-of-bounds read vulnerability

Php · Php

The get_icu_value_internal function in ext/intl/locale/locale_methods.c in PHP before 5.5.36, 5.6.x before 5.6.22, and 7.x before 7.0.7 does not ensure the presence of a '\0' character, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a crafted locale_get_primary_language call.

8.6 CVSS 3.0 High EPSS 5.5% · top 7.5% CWE-125 · Out-of-bounds read
8.6CVSS 3.0 base score, v2 7.5
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The get_icu_value_internal function in ext/intl/locale/locale_methods.c in PHP before 5.5.36, 5.6.x before 5.6.22, and 7.x before 7.0.7 does not ensure the presence of a '\0' character, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a crafted locale_get_primary_language call.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://php.net/ChangeLog-5.php PatchRelease Notes
http://php.net/ChangeLog-7.php PatchRelease Notes
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.debian.org/security/2016/dsa-3602
http://www.openwall.com/lists/oss-security/2016/05/26/3 Release Notes
http://www.securityfocus.com/bid/90946
https://bugs.php.net/bug.php?id=72241 Exploit
https://github.com/php/php-src/commit/97eff7eb57fc2320c267a949cffd622c38712484?w=1 Patch
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
http://php.net/ChangeLog-5.php PatchRelease Notes
http://php.net/ChangeLog-7.php PatchRelease Notes
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://www.debian.org/security/2016/dsa-3602
http://www.openwall.com/lists/oss-security/2016/05/26/3 Release Notes
http://www.securityfocus.com/bid/90946
https://bugs.php.net/bug.php?id=72241 Exploit
https://github.com/php/php-src/commit/97eff7eb57fc2320c267a949cffd622c38712484?w=1 Patch
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-5093), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.