{"id":"UBUNTU-CVE-2026-7259","details":"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, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().","modified":"2026-05-28T15:45:22.487859107Z","published":"2026-05-10T05:16:00Z","related":["USN-8336-1"],"upstream":["CVE-2026-7259"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-7259"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-7259"},{"type":"REPORT","url":"https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8336-1"}],"affected":[{"package":{"name":"php8.1","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/php8.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1.2-1ubuntu2.24"}]}],"versions":["8.1.0~rc4-1ubuntu2","8.1.0-1","8.1.2-1ubuntu1","8.1.2-1ubuntu2","8.1.2-1ubuntu2.1","8.1.2-1ubuntu2.2","8.1.2-1ubuntu2.3","8.1.2-1ubuntu2.4","8.1.2-1ubuntu2.5","8.1.2-1ubuntu2.6","8.1.2-1ubuntu2.8","8.1.2-1ubuntu2.9","8.1.2-1ubuntu2.10","8.1.2-1ubuntu2.11","8.1.2-1ubuntu2.13","8.1.2-1ubuntu2.14","8.1.2-1ubuntu2.15","8.1.2-1ubuntu2.17","8.1.2-1ubuntu2.18","8.1.2-1ubuntu2.19","8.1.2-1ubuntu2.20","8.1.2-1ubuntu2.21","8.1.2-1ubuntu2.22","8.1.2-1ubuntu2.23"],"ecosystem_specific":{"binaries":[{"binary_name":"libapache2-mod-php7.4","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"libapache2-mod-php8.0"},{"binary_name":"libapache2-mod-php8.1","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"libphp8.1-embed"},{"binary_name":"php8.1","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-bcmath","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-bz2"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-cgi"},{"binary_name":"php8.1-cli","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-common","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-curl"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-dba"},{"binary_name":"php8.1-enchant","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-fpm","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-gd","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-gmp","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-imap","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-interbase","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-intl","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-ldap"},{"binary_name":"php8.1-mbstring","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-mysql","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-odbc","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-opcache","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-pgsql"},{"binary_name":"php8.1-phpdbg","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-pspell","binary_version":"8.1.2-1ubuntu2.24"},{"binary_name":"php8.1-readline","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-snmp"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-soap"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-sqlite3"},{"binary_name":"php8.1-sybase","binary_version":"8.1.2-1ubuntu2.24"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-tidy"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-xml"},{"binary_version":"8.1.2-1ubuntu2.24","binary_name":"php8.1-xsl"},{"binary_name":"php8.1-zip","binary_version":"8.1.2-1ubuntu2.24"}],"availability":"No 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