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    CVE-2006-4812

    Integer overflow in PHP 5 up to 5.1.6 and 4 before 4.3.0 allows remote attackers to execute arbitrary code via an argument to the unserialize PHP function with a large value for the number of array elements, which triggers the overflow in the Zend Engine ecalloc function (Zend/zend_alloc.c).

    Published:Sep 30, 2006
    Last Modified:Apr 23, 2026
    EPS:Oct 9, 2006
    EPSS Score:0.39413
    CVSS Score:10

    Affected Products

    Vendor
    Php
    Product
    Php
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Application Stack

    Exploits

    https://www.exploit-db.com/exploits/28760

    Related CVEs

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    CVE-2026-6722 (CVSS 9.5) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the SOA…
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    References

    http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162
    http://lists.suse.com/archive/suse-security-announce/2006-Oct/0002.html
    http://rhn.redhat.com/errata/RHSA-2006-0688.html
    http://rhn.redhat.com/errata/RHSA-2006-0708.html
    http://secunia.com/advisories/22280
    http://secunia.com/advisories/22281
    http://secunia.com/advisories/22300
    http://secunia.com/advisories/22331
    http://secunia.com/advisories/22338
    http://secunia.com/advisories/22533
    http://secunia.com/advisories/22538
    http://secunia.com/advisories/22650
    http://securityreason.com/securityalert/1691
    http://securitytracker.com/id?1016984
    http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
    http://support.avaya.com/elmodocs2/security/ASA-2006-234.htm
    http://www.gentoo.org/security/en/glsa/glsa-200610-14.xml
    http://www.hardened-php.net/advisory_092006.133.html
    http://www.hardened-php.net/files/CVE-2006-4812.patch
    http://www.securityfocus.com/archive/1/448014/100/0/threaded
    http://www.securityfocus.com/archive/1/448953/100/0/threaded
    http://www.securityfocus.com/bid/20349
    http://www.trustix.org/errata/2006/0055
    http://www.ubuntu.com/usn/usn-362-1
    http://www.vupen.com/english/advisories/2006/3922
    https://exchange.xforce.ibmcloud.com/vulnerabilities/29362
    http://cvs.php.net/viewvc.cgi/ZendEngine2/zend_alloc.c?r1=1.161&r2=1.162
    http://lists.suse.com/archive/suse-security-announce/2006-Oct/0002.html
    http://rhn.redhat.com/errata/RHSA-2006-0688.html
    http://rhn.redhat.com/errata/RHSA-2006-0708.html
    http://secunia.com/advisories/22280
    http://secunia.com/advisories/22281
    http://secunia.com/advisories/22300
    http://secunia.com/advisories/22331
    http://secunia.com/advisories/22338
    http://secunia.com/advisories/22533
    http://secunia.com/advisories/22538
    http://secunia.com/advisories/22650
    http://securityreason.com/securityalert/1691
    http://securitytracker.com/id?1016984
    http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
    http://support.avaya.com/elmodocs2/security/ASA-2006-234.htm
    http://www.gentoo.org/security/en/glsa/glsa-200610-14.xml
    http://www.hardened-php.net/advisory_092006.133.html
    http://www.hardened-php.net/files/CVE-2006-4812.patch
    http://www.securityfocus.com/archive/1/448014/100/0/threaded
    http://www.securityfocus.com/archive/1/448953/100/0/threaded
    http://www.securityfocus.com/bid/20349
    http://www.trustix.org/errata/2006/0055
    http://www.ubuntu.com/usn/usn-362-1
    http://www.vupen.com/english/advisories/2006/3922
    https://exchange.xforce.ibmcloud.com/vulnerabilities/29362

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High