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A NULL pointer dereference in the mod_authn_socache in Apache HTTP Server 2.4.66 and earlier allows an unauthenticated remote user to crash a child process in a caching forward proxy configuration.
Users are recommended to upgrade to version 2.4.67, which fixes this issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade mod_ldapUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade httpd-filesystemUpgrade mod_http2Upgrade httpd-coreUpgrade httpd-toolsUpgrade mod_mdUpgrade mod_luaUpgrade httpd-manualUpgrade httpdUpgrade mod_sslUpgrade httpd-devel | May 31, 2026 | May 27, 2026 |
| Alpine Linux | — | Upgrade apache2 | May 6, 2026 | May 4, 2026 |
| Amazon Linux Ami 2 | — | Upgrade httpdUpgrade mod_sslUpgrade httpd-develUpgrade httpd-toolsUpgrade httpd-manualUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade httpd-debuginfoUpgrade mod_ldapUpgrade mod_md | Jun 8, 2026 | Jun 8, 2026 |
| Amazon_linux_2023 | — | Upgrade httpd-toolsUpgrade mod_lua-debuginfoUpgrade httpd-debugsourceUpgrade httpd-core-debuginfoUpgrade httpd-manualUpgrade httpd-coreUpgrade mod_proxy_htmlUpgrade mod_ssl-debuginfoUpgrade mod_ldap-debuginfoUpgrade mod_ldapUpgrade mod_luaUpgrade httpd-develUpgrade httpd-tools-debuginfoUpgrade httpdUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_sslUpgrade httpd-filesystemUpgrade mod_session-debuginfoUpgrade mod_session | May 28, 2026 | May 4, 2026 |
| Apache Httpd | — | Upgrade to the latest version of Apache HTTPD | May 5, 2026 | May 4, 2026 |
| Debian | — | Upgrade apache2 | May 7, 2026 | May 7, 2026 |
| Freebsd | — | Upgrade apache24 | May 6, 2026 | May 5, 2026 |
| Gentoo Linux | — | Upgrade www-servers/apache. | Aug 16, 2026 | Aug 13, 2026 |
| Oracle_linux | — | Upgrade mod_sslUpgrade httpd-filesystemUpgrade mod_ldapUpgrade mod_sessionUpgrade mod_proxy_htmlUpgrade httpd-toolsUpgrade httpdUpgrade httpd-develUpgrade httpd-coreUpgrade mod_luaUpgrade httpd-manual | Oct 22, 2026 | May 4, 2026 |
| Redhat_linux | — | Upgrade httpd-core-debuginfoUpgrade mod_lua-debuginfoUpgrade httpd-coreUpgrade httpd-manualUpgrade httpdUpgrade mod_mdUpgrade httpd-debugsourceUpgrade httpd-develUpgrade mod_http2-debugsourceUpgrade mod_ldap-debuginfoUpgrade httpd-toolsUpgrade mod_http2-debuginfoUpgrade mod_md-debugsourceNo solution existsUpgrade mod_ssl-debuginfoUpgrade mod_md-debuginfoUpgrade httpd-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-filesystemUpgrade mod_proxy_html-debuginfoUpgrade mod_http2Upgrade mod_sessionUpgrade mod_ldapUpgrade mod_luaUpgrade mod_sslUpgrade mod_session-debuginfo | Jun 3, 2026 | May 4, 2026 |
| Rocky_linux | — | Upgrade mod_ldap-debuginfoUpgrade mod_mdUpgrade mod_md-debuginfoUpgrade mod_lua-debuginfoUpgrade mod_http2-debugsourceUpgrade httpd-toolsUpgrade httpdUpgrade httpd-coreUpgrade mod_ldapUpgrade httpd-debugsourceUpgrade mod_sessionUpgrade mod_sslUpgrade httpd-core-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-tools-debuginfoUpgrade httpd-develUpgrade mod_proxy_htmlUpgrade httpd-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_http2Upgrade mod_md-debugsourceUpgrade mod_session-debuginfoUpgrade mod_luaUpgrade mod_http2-debuginfo | Jun 1, 2026 | May 30, 2026 |
| Ubuntu | — | Upgrade apache2-dev (Ubuntu Pro)Upgrade libapache2-mod-proxy-uwsgi (Ubuntu Pro)Upgrade apache2-mpm-event (Ubuntu Pro)Upgrade libapache2-mod-proxy-html (Ubuntu Pro)Upgrade libapache2-mod-md (Ubuntu Pro)Upgrade apache2-mpm-prefork (Ubuntu Pro)Upgrade apache2-utils (Ubuntu Pro)Upgrade apache2-mpm-itk (Ubuntu Pro)Upgrade apache2-mpm-worker (Ubuntu Pro)Upgrade apache2-suexec-pristine (Ubuntu Pro)Upgrade apache2 (Ubuntu Pro)Upgrade apache2-bin (Ubuntu Pro)Upgrade apache2-ssl-dev (Ubuntu Pro)Upgrade apache2-suexec-custom (Ubuntu Pro)Upgrade libapache2-mod-macro (Ubuntu Pro)Upgrade apache2Upgrade apache2.2-bin (Ubuntu Pro)Upgrade apache2-suexec (Ubuntu Pro) | May 7, 2026 | May 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 29, 2026 | May 4, 2026 |
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