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The session deserializer in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 mishandles multiple php_var_unserialize calls, which allow remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted session content.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade php | Aug 30, 2017 | Jan 19, 2016 |
| Apple Osx Accelerateframework | — | Upgrade macOS to the latest versionApply OS X security update 2015-007 | Oct 22, 2015 | Oct 22, 2015 |
| Apple Osx Apachemodphp | — | Apply OS X security update 2015-004 YosemiteApply OS X security update 2015-007 MavericksUpgrade macOS to the latest version | Mar 29, 2016 | Mar 29, 2016 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Oct 8, 2015 |
| Freebsd | — | Upgrade php55-xslUpgrade php56Upgrade php5-soapUpgrade php55Upgrade php55-soapUpgrade php5Upgrade php5-xslUpgrade php56-soapUpgrade php56-xsl | Dec 10, 2025 | Sep 8, 2015 |
| Gentoo Linux | — | Upgrade dev-lang/php. | Oct 30, 2017 | May 16, 2016 |
| Oracle Solaris | — | Upgrade entire/ to version 11.4-11.4.0.0.1.15.0 on Solaris 11.4 | Oct 19, 2018 | May 16, 2016 |
| Php | — | Upgrade to PHP version 5.4.45Upgrade to PHP version 5.5.29Upgrade to PHP version 5.6.13 | Jun 3, 2016 | May 16, 2016 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Aug 9, 2015 |
| Suse | — | Upgrade php5-calendarUpgrade php5-xmlreaderUpgrade php5-domUpgrade php5-bz2Upgrade php5-mbstringUpgrade php5-sqliteUpgrade php5-opensslUpgrade php5-jsonUpgrade php5-xmlwriterUpgrade php5-gmpUpgrade php5-pdoUpgrade php5-mysqlUpgrade php5-odbcUpgrade php5-curlUpgrade php5-ftpUpgrade php5-iconvUpgrade php5-shmopUpgrade php5-socketsUpgrade php5-snmpUpgrade php5-sysvsemUpgrade php5-fastcgiUpgrade php5-xslUpgrade php5-pearUpgrade php5-mcryptUpgrade php5-sysvmsgUpgrade php5-exifUpgrade php5-soapUpgrade php5-develUpgrade php5-fileinfoUpgrade php5-bcmathUpgrade php5-enchantUpgrade php5-intlUpgrade php5-tokenizerUpgrade php5Upgrade php5-dbaUpgrade php5-ldapUpgrade php5-gdUpgrade php5-pspellUpgrade php5-gettextUpgrade php5-opcacheUpgrade php5-pcntlUpgrade php5-ctypeUpgrade php5-zlibUpgrade php5-suhosinUpgrade php5-pgsqlUpgrade php5-zipUpgrade php5-fpmUpgrade apache2-mod_php5Upgrade php5-sysvshmUpgrade php5-posixUpgrade php5-wddxUpgrade php5-xmlrpc | Dec 18, 2015 | Sep 25, 2015 |
| Ubuntu | — | Upgrade php5-cliUpgrade libapache2-mod-php5Upgrade php5-fpmUpgrade php5-cgi | Nov 8, 2024 | May 16, 2016 |
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