CVE-2006-4486

CVE-2006-4486 is a low-severity vulnerability in Php with a CVSS 2.0 base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-189.

Key facts

• Severity: Low (CVSS 2.0 base score 2.6)
• EPSS exploit prediction: 2% (75th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-189
• Affected product: Php
• Published: 2006-08-31
• Last modified: 2026-06-16

Description

Integer overflow in memory allocation routines in PHP before 5.1.6, when running on a 64-bit system, allows context-dependent attackers to bypass the memory_limit restriction.

Frequently asked questions

What is CVE-2006-4486?

Integer overflow in memory allocation routines in PHP before 5.1.6, when running on a 64-bit system, allows context-dependent attackers to bypass the memory_limit restriction.

How severe is CVE-2006-4486?

CVE-2006-4486 has a CVSS 2.0 base score of 2.6, rated low severity.

Is CVE-2006-4486 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-4486?

CVE-2006-4486 primarily affects Php. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-4486?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-4486 published?

CVE-2006-4486 was published on 2006-08-31 and last updated on 2026-06-16.

References

• ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
• http://rhn.redhat.com/errata/RHSA-2006-0688.html
• http://secunia.com/advisories/21546
• http://secunia.com/advisories/22004
• http://secunia.com/advisories/22069
• http://secunia.com/advisories/22225
• http://secunia.com/advisories/22331
• http://secunia.com/advisories/22440
• http://secunia.com/advisories/22487
• http://secunia.com/advisories/22538
• http://secunia.com/advisories/25945
• http://securitytracker.com/id?1016984
• http://support.avaya.com/elmodocs2/security/ASA-2006-221.htm
• http://support.avaya.com/elmodocs2/security/ASA-2006-222.htm
• http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
• http://www.debian.org/security/2007/dsa-1331
• http://www.hardened-php.net/hphp/changelog.html#hardening_patch_0.4.14
• http://www.novell.com/linux/security/advisories/2006_52_php.html
• http://www.php.net/ChangeLog-5.php#5.1.6
• http://www.php.net/release_5_1_6.php
• http://www.redhat.com/support/errata/RHSA-2006-0669.html
• http://www.redhat.com/support/errata/RHSA-2006-0682.html
• http://www.securityfocus.com/archive/1/447866/100/0/threaded
• http://www.securityfocus.com/bid/19582
• http://www.turbolinux.com/security/2006/TLSA-2006-38.txt
• http://www.ubuntu.com/usn/usn-362-1
• https://issues.rpath.com/browse/RPL-683
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11086

Affected products (5)

• cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:*

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