In PHP versions:8.1.* before 8.1.34, 8.2.* before 8.2.30, 8.3.* before 8.3.29, 8.4.* before 8.4.16, 8.5.* before 8.5.1, a heap buffer overflow occurs in array_merge() when the total element count of packed arrays exceeds 32-bit limits or HT_MAX_SIZE, due to an integer overflow in the precomputation of element counts using zend_hash_num_elements(). This may lead to memory corruption or crashes and affect the integrity and availability of the target server.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade php-fpmUpgrade php-xmlrpcUpgrade php-bcmathUpgrade php-cliUpgrade libzipUpgrade php-pecl-xdebug3Upgrade php-jsonUpgrade php-xmlUpgrade php-gmpUpgrade php-pecl-xdebugUpgrade php-pecl-apcuUpgrade php-mbstringUpgrade php-snmpUpgrade php-pearUpgrade php-pecl-zipUpgrade php-pdoUpgrade php-develUpgrade php-pecl-redis6Upgrade php-dbaUpgrade php-pgsqlUpgrade apcu-panelUpgrade php-commonUpgrade php-dbgUpgrade php-intlUpgrade php-gdUpgrade php-opcacheUpgrade libzip-develUpgrade php-pecl-rrdUpgrade phpUpgrade php-mysqlndUpgrade libzip-toolsUpgrade php-processUpgrade php-enchantUpgrade php-ffiUpgrade php-pecl-apcu-develUpgrade php-ldapUpgrade php-soapUpgrade php-odbcUpgrade php-embedded | Feb 2, 2026 | Jan 27, 2026 |
| Alpine Linux | — | Upgrade php81Upgrade php82Upgrade php85Upgrade php83Upgrade php84 | Jan 5, 2026 | Dec 27, 2025 |
| Amazon Linux Ami 2 | — | Upgrade php-develUpgrade php-soapUpgrade php-pgsqlUpgrade php-processUpgrade php-gmpUpgrade php-bcmathUpgrade php-pspellUpgrade php-mbstringUpgrade php-commonUpgrade php-fpmUpgrade php-xmlUpgrade php-pdoUpgrade php-odbcUpgrade php-embeddedUpgrade php-debuginfoUpgrade php-enchantUpgrade php-ldapUpgrade php-dbaUpgrade php-snmpUpgrade php-gdUpgrade phpUpgrade php-opcacheUpgrade php-mysqlndUpgrade php-sodiumUpgrade php-cliUpgrade php-dbgUpgrade php-intl | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade php8.3-xml-debuginfoUpgrade php8.1Upgrade php8.4-tidyUpgrade php8.4-embedded-debuginfoUpgrade php8.4-pdoUpgrade php8.4-opcacheUpgrade php8.4-embeddedUpgrade php8.4-enchant-debuginfoUpgrade php8.1-mbstringUpgrade php8.2-sodium-debuginfoUpgrade php8.2-mysqlnd-debuginfoUpgrade php8.1-pgsql-debuginfoUpgrade php8.1-fpm-debuginfoUpgrade php8.1-enchant-debuginfoUpgrade php8.1-debuginfoUpgrade php8.4-ldap-debuginfoUpgrade php8.3-fpm-debuginfoUpgrade php8.2-commonUpgrade php8.1-tidy-debuginfoUpgrade php8.1-opcacheUpgrade php8.2-develUpgrade php8.4-common-debuginfoUpgrade php8.4-cli-debuginfoUpgrade php8.3-processUpgrade php8.3-fpmUpgrade php8.4-sodiumUpgrade php8.4Upgrade php8.3-zipUpgrade php8.3-modphp-debuginfoUpgrade php8.2-soapUpgrade php8.2-pdoUpgrade php8.2-mbstring-debuginfoUpgrade php8.1-opcache-debuginfoUpgrade php8.1-pdoUpgrade php8.4-process-debuginfoUpgrade php8.4-odbcUpgrade php8.2-enchant-debuginfoUpgrade php8.2-bcmathUpgrade php8.1-mbstring-debuginfoUpgrade php8.1-debugsourceUpgrade php8.1-dbg-debuginfoUpgrade php8.3-gmpUpgrade php8.2-pgsqlUpgrade php8.2-cli-debuginfoUpgrade php8.1-bcmath-debuginfoUpgrade php8.4-soapUpgrade php8.4-pgsqlUpgrade php8.2-dba-debuginfoUpgrade php8.4-mysqlndUpgrade php8.4-modphpUpgrade php8.3-intl-debuginfoUpgrade php8.2-tidy-debuginfoUpgrade php8.2-ldap-debuginfoUpgrade php8.2-pdo-debuginfoUpgrade php8.2-opcacheUpgrade php8.4-mbstringUpgrade php8.4-intl-debuginfoUpgrade php8.2-mbstringUpgrade php8.3-embeddedUpgrade php8.3-commonUpgrade php8.2-intlUpgrade php8.3-ffi-debuginfoUpgrade php8.2-fpmUpgrade php8.2-dbgUpgrade php8.1-soapUpgrade php8.1-intl-debuginfoUpgrade php8.4-opcache-debuginfoUpgrade php8.4-zip-debuginfoUpgrade php8.4-odbc-debuginfoUpgrade php8.4-develUpgrade php8.3-mbstringUpgrade php8.3-snmpUpgrade php8.4-gmpUpgrade php8.4-fpm-debuginfoUpgrade php8.1-odbc-debuginfoUpgrade php8.1-cli-debuginfoUpgrade php8.2-embedded-debuginfoUpgrade php8.2-embeddedUpgrade php8.3-dbaUpgrade php8.1-gdUpgrade php8.4-sodium-debuginfoUpgrade php8.2-soap-debuginfoUpgrade php8.1-bcmathUpgrade php8.4-fpmUpgrade php8.3Upgrade php8.2-debuginfoUpgrade php8.2-common-debuginfoUpgrade php8.1-intlUpgrade php8.1-gd-debuginfoUpgrade php8.4-cliUpgrade php8.3-pspellUpgrade php8.3-pgsql-debuginfoUpgrade php8.3-opcache-debuginfoUpgrade php8.3-gmp-debuginfoUpgrade php8.3-enchant-debuginfoUpgrade php8.3-debugsourceUpgrade php8.3-debuginfoUpgrade php8.1-pspellUpgrade php8.2-enchantUpgrade php8.3-pdo-debuginfoUpgrade php8.3-mbstring-debuginfoUpgrade php8.3-embedded-debuginfoUpgrade php8.2-snmp-debuginfoUpgrade php8.2-gmp-debuginfoUpgrade php8.1-develUpgrade php8.4-tidy-debuginfoUpgrade php8.3-process-debuginfoUpgrade php8.4-debugsourceUpgrade php8.2-ffi-debuginfoUpgrade php8.4-ffiUpgrade php8.4-modphp-debuginfoUpgrade php8.4-processUpgrade php8.1-pspell-debuginfoUpgrade php8.2-ffiUpgrade php8.1-process-debuginfoUpgrade php8.3-cliUpgrade php8.1-enchantUpgrade php8.1-fpmUpgrade php8.1-mysqlndUpgrade php8.3-common-debuginfoUpgrade php8.2-opcache-debuginfoUpgrade php8.2-xmlUpgrade php8.1-pgsqlUpgrade php8.2-zipUpgrade php8.1-mysqlnd-debuginfoUpgrade php8.3-modphpUpgrade php8.3-dbgUpgrade php8.1-tidyUpgrade php8.2-gd-debuginfoUpgrade php8.1-gmpUpgrade php8.2-gmpUpgrade php8.3-dba-debuginfoUpgrade php8.1-cliUpgrade php8.2-sodiumUpgrade php8.4-xml-debuginfoUpgrade php8.3-sodium-debuginfoUpgrade php8.4-bcmathUpgrade php8.4-intlUpgrade php8.2-tidyUpgrade php8.3-dbg-debuginfoUpgrade php8.3-enchantUpgrade php8.3-gdUpgrade php8.3-soap-debuginfoUpgrade php8.3-tidy-debuginfoUpgrade php8.3-opcacheUpgrade php8.4-ldapUpgrade php8.4-bcmath-debuginfoUpgrade php8.3-gd-debuginfoUpgrade php8.3-odbc-debuginfoUpgrade php8.4-mysqlnd-debuginfoUpgrade php8.3-zip-debuginfoUpgrade php8.4-commonUpgrade php8.3-xmlUpgrade php8.4-debuginfoUpgrade php8.4-zipUpgrade php8.3-mysqlnd-debuginfoUpgrade php8.4-gdUpgrade php8.4-gd-debuginfoUpgrade php8.2-ldapUpgrade php8.3-bcmathUpgrade php8.2-dbg-debuginfoUpgrade php8.3-cli-debuginfoUpgrade php8.2-snmpUpgrade php8.1-pdo-debuginfoUpgrade php8.2-bcmath-debuginfoUpgrade php8.3-mysqlndUpgrade php8.2-cliUpgrade php8.4-mbstring-debuginfoUpgrade php8.3-pgsqlUpgrade php8.2-xml-debuginfoUpgrade php8.3-pdoUpgrade php8.1-snmp-debuginfoUpgrade php8.3-pspell-debuginfoUpgrade php8.1-commonUpgrade php8.1-embedded-debuginfoUpgrade php8.1-ffiUpgrade php8.1-common-debuginfoUpgrade php8.1-ldapUpgrade php8.4-pgsql-debuginfoUpgrade php8.1-ffi-debuginfoUpgrade php8.3-soapUpgrade php8.4-dbg-debuginfoUpgrade php8.2-odbcUpgrade php8.2-pgsql-debuginfoUpgrade php8.2-debugsourceUpgrade php8.2-pspell-debuginfoUpgrade php8.1-gmp-debuginfoUpgrade php8.1-zip-debuginfoUpgrade php8.4-dbaUpgrade php8.2-pspellUpgrade php8.2-zip-debuginfoUpgrade php8.3-ffiUpgrade php8.1-xml-debuginfoUpgrade php8.1-processUpgrade php8.4-dbgUpgrade php8.1-xmlUpgrade php8.2-odbc-debuginfoUpgrade php8.3-ldap-debuginfoUpgrade php8.1-zipUpgrade php8.3-tidyUpgrade php8.3-ldapUpgrade php8.3-sodiumUpgrade php8.1-dba-debuginfoUpgrade php8.1-dbgUpgrade php8.3-snmp-debuginfoUpgrade php8.1-ldap-debuginfoUpgrade php8.4-ffi-debuginfoUpgrade php8.1-dbaUpgrade php8.4-enchantUpgrade php8.2-mysqlndUpgrade php8.2Upgrade php8.2-fpm-debuginfoUpgrade php8.4-dba-debuginfoUpgrade php8.3-odbcUpgrade php8.4-gmp-debuginfoUpgrade php8.4-pdo-debuginfoUpgrade php8.3-intlUpgrade php8.2-intl-debuginfoUpgrade php8.1-odbcUpgrade php8.2-process-debuginfoUpgrade php8.3-develUpgrade php8.4-soap-debuginfoUpgrade php8.4-snmpUpgrade php8.1-snmpUpgrade php8.1-soap-debuginfoUpgrade php8.2-dbaUpgrade php8.4-xmlUpgrade php8.2-processUpgrade php8.1-embeddedUpgrade php8.2-gdUpgrade php8.3-bcmath-debuginfoUpgrade php8.4-snmp-debuginfo | Jan 12, 2026 | Dec 27, 2025 |
| Debian | — | Upgrade php8.4Upgrade php7.4Upgrade php8.2 | Jan 26, 2026 | Jan 26, 2026 |
| Oracle_linux | — | Upgrade libzipUpgrade php-develUpgrade php-dbaUpgrade php-embeddedUpgrade php-gmpUpgrade php-mysqlndUpgrade php-pecl-apcuUpgrade php-jsonUpgrade php-soapUpgrade php-pecl-xdebug3Upgrade phpUpgrade php-pecl-xdebugUpgrade php-fpmUpgrade php-bcmathUpgrade php-pdoUpgrade php-pecl-apcu-develUpgrade php-opcacheUpgrade php-pecl-redis6Upgrade php-enchantUpgrade php-dbgUpgrade php-gdUpgrade php-pecl-zipUpgrade php-pearUpgrade apcu-panelUpgrade php-ldapUpgrade php-intlUpgrade php-xmlrpcUpgrade php-xmlUpgrade php-pgsqlUpgrade php-commonUpgrade php-processUpgrade libzip-develUpgrade php-pecl-rrdUpgrade php-ffiUpgrade php-mbstringUpgrade php-cliUpgrade libzip-toolsUpgrade php-snmpUpgrade php-odbc | Jan 29, 2026 | Dec 27, 2025 |
| Redhat_linux | — | Upgrade php-pgsql-debuginfoUpgrade php-pecl-xdebugUpgrade php-pecl-redis6-debuginfoUpgrade php-pecl-xdebug3-debuginfoUpgrade php-dbgUpgrade libzip-develUpgrade php-enchant-debuginfoUpgrade php-pecl-apcuUpgrade php-json-debuginfoUpgrade php-fpmUpgrade libzip-debuginfoUpgrade php-pecl-rrd-debugsourceUpgrade php-debuginfoUpgrade php-fpm-debuginfoUpgrade php-xmlUpgrade libzip-toolsUpgrade php-processUpgrade apcu-panelUpgrade php-pecl-apcu-develUpgrade php-pecl-redis6-debugsourceUpgrade php-gdUpgrade php-pecl-xdebug3-debugsourceUpgrade php-gd-debuginfoUpgrade php-enchantUpgrade php-ffiUpgrade php-odbc-debuginfoUpgrade php-pecl-apcu-debuginfoUpgrade php-intlUpgrade libzip-debugsourceUpgrade phpUpgrade php-jsonUpgrade php-debugsourceUpgrade php-embeddedUpgrade libzip-tools-debuginfoUpgrade php-bcmath-debuginfoUpgrade php-pecl-rrd-debuginfoUpgrade php-bcmathUpgrade php-pecl-zip-debugsourceUpgrade php-process-debuginfoUpgrade php-dbaUpgrade php-soapUpgrade php-pdo-debuginfoUpgrade php-xmlrpcUpgrade php-opcache-debuginfoUpgrade php-embedded-debuginfoUpgrade php-gmpUpgrade php-dbg-debuginfoUpgrade php-pdoUpgrade php-pecl-zipUpgrade php-cli-debuginfoUpgrade php-intl-debuginfoUpgrade php-mbstringUpgrade php-xmlrpc-debuginfoUpgrade php-ldap-debuginfoUpgrade php-pecl-rrdUpgrade php-gmp-debuginfoUpgrade libzipUpgrade php-snmp-debuginfoUpgrade php-ffi-debuginfoUpgrade php-develUpgrade php-pecl-xdebug3Upgrade php-pecl-xdebug-debugsourceUpgrade php-xml-debuginfoUpgrade php-mysqlnd-debuginfoUpgrade php-common-debuginfoUpgrade php-pgsqlUpgrade php-pearUpgrade php-opcacheUpgrade php-odbcUpgrade php-mysqlndUpgrade php-mbstring-debuginfoUpgrade php-cliUpgrade php-snmpUpgrade php-pecl-zip-debuginfoUpgrade php-pecl-apcu-debugsourceUpgrade php-commonUpgrade php-dba-debuginfoUpgrade php-soap-debuginfoUpgrade php-pecl-redis6Upgrade php-ldapUpgrade php-pecl-xdebug-debuginfo | Jan 27, 2026 | Dec 27, 2025 |
| Rocky_linux | — | Upgrade php-debuginfoUpgrade php-pecl-zip-debuginfoUpgrade php-pecl-xdebug-debugsourceUpgrade php-ldap-debuginfoUpgrade php-commonUpgrade php-opcache-debuginfoUpgrade php-pecl-redis6Upgrade php-snmp-debuginfoUpgrade php-common-debuginfoUpgrade php-snmpUpgrade php-odbcUpgrade php-mbstringUpgrade libzip-debuginfoUpgrade php-pgsqlUpgrade php-pecl-apcu-debugsourceUpgrade php-pecl-redis6-debuginfoUpgrade php-xml-debuginfoUpgrade php-cliUpgrade php-soap-debuginfoUpgrade php-mbstring-debuginfoUpgrade php-intl-debuginfoUpgrade php-xmlrpcUpgrade php-json-debuginfoUpgrade php-pecl-xdebugUpgrade php-bcmath-debuginfoUpgrade php-dbgUpgrade libzip-develUpgrade libzip-toolsUpgrade php-dba-debuginfoUpgrade php-ffiUpgrade php-mysqlnd-debuginfoUpgrade php-pecl-rrd-debuginfoUpgrade php-xmlUpgrade php-pgsql-debuginfoUpgrade php-pecl-zip-debugsourceUpgrade php-odbc-debuginfoUpgrade php-pecl-zipUpgrade php-pecl-xdebug3Upgrade php-pdoUpgrade php-dbaUpgrade php-pecl-xdebug3-debuginfoUpgrade php-dbg-debuginfoUpgrade php-pecl-rrd-debugsourceUpgrade php-intlUpgrade php-cli-debuginfoUpgrade php-bcmathUpgrade php-pecl-rrdUpgrade php-jsonUpgrade php-gmpUpgrade php-gd-debuginfoUpgrade php-ldapUpgrade php-process-debuginfoUpgrade php-pecl-apcuUpgrade php-soapUpgrade php-pecl-xdebug-debuginfoUpgrade php-gmp-debuginfoUpgrade php-mysqlndUpgrade phpUpgrade php-pecl-apcu-develUpgrade php-pecl-xdebug3-debugsourceUpgrade php-pdo-debuginfoUpgrade php-opcacheUpgrade php-fpm-debuginfoUpgrade php-develUpgrade php-debugsourceUpgrade php-processUpgrade php-embeddedUpgrade php-embedded-debuginfoUpgrade php-gdUpgrade libzipUpgrade php-xmlrpc-debuginfoUpgrade php-ffi-debuginfoUpgrade php-pecl-apcu-debuginfoUpgrade php-enchant-debuginfoUpgrade libzip-tools-debuginfoUpgrade libzip-debugsourceUpgrade php-enchantUpgrade php-fpmUpgrade php-pecl-redis6-debugsource | Jan 29, 2026 | Jan 28, 2026 |
| Ubuntu | — | Upgrade php8.4Upgrade php7.2 (Ubuntu Pro)Upgrade php8.3Upgrade php8.1Upgrade php7.4 (Ubuntu Pro) | Jan 13, 2026 | Dec 27, 2025 |
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