A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version 1.2.0.
Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade mod_sslUpgrade mod_mdUpgrade httpd-filesystemUpgrade mod_http2Upgrade mod_proxy_htmlUpgrade httpd-develUpgrade httpd-toolsUpgrade mod_sessionUpgrade httpd-coreUpgrade httpd-manualUpgrade mod_ldapUpgrade httpdUpgrade mod_lua | Jul 21, 2026 | Jul 20, 2026 |
| Alpine Linux | — | Upgrade apache2 | May 6, 2026 | May 4, 2026 |
| Amazon Linux Ami 2 | — | Upgrade httpd-toolsUpgrade httpd-debuginfoUpgrade mod_sslUpgrade httpd-develUpgrade httpdUpgrade mod_sessionUpgrade mod_ldapUpgrade httpd-filesystemUpgrade mod_proxy_htmlUpgrade httpd-manualUpgrade mod_md | Jun 8, 2026 | Jun 8, 2026 |
| Amazon_linux_2023 | — | Upgrade mod_session-debuginfoUpgrade mod_ssl-debuginfoUpgrade mod_proxy_html-debuginfoUpgrade httpd-debuginfoUpgrade mod_proxy_htmlUpgrade mod_sessionUpgrade mod_ldapUpgrade mod_luaUpgrade httpd-filesystemUpgrade httpdUpgrade mod_sslUpgrade httpd-core-debuginfoUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade httpd-debugsourceUpgrade httpd-tools-debuginfoUpgrade httpd-coreUpgrade mod_lua-debuginfoUpgrade httpd-toolsUpgrade httpd-manual | 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 |
| Redhat_linux | — | Upgrade mod_lua-debuginfoUpgrade httpdUpgrade httpd-toolsUpgrade mod_md-debuginfoUpgrade httpd-manualUpgrade mod_ldap-debuginfoUpgrade httpd-core-debuginfoUpgrade mod_sslUpgrade mod_mdUpgrade mod_ldapUpgrade httpd-debugsourceUpgrade mod_proxy_html-debuginfoUpgrade mod_sessionUpgrade httpd-coreUpgrade mod_http2-debugsourceUpgrade mod_http2Upgrade httpd-tools-debuginfoUpgrade mod_session-debuginfoUpgrade mod_http2-debuginfoUpgrade httpd-develUpgrade mod_luaUpgrade httpd-debuginfoUpgrade mod_md-debugsourceUpgrade mod_ssl-debuginfoUpgrade mod_proxy_htmlUpgrade httpd-filesystemNo solution exists | Jul 3, 2026 | May 4, 2026 |
| Rocky_linux | — | Upgrade mod_md-debugsourceUpgrade mod_session-debuginfoUpgrade httpd-debuginfoUpgrade httpd-develUpgrade mod_ldap-debuginfoUpgrade mod_mdUpgrade httpd-core-debuginfoUpgrade mod_sessionUpgrade httpd-coreUpgrade mod_http2-debugsourceUpgrade httpdUpgrade mod_proxy_htmlUpgrade mod_http2-debuginfoUpgrade mod_sslUpgrade mod_md-debuginfoUpgrade httpd-debugsourceUpgrade mod_luaUpgrade mod_ssl-debuginfoUpgrade httpd-toolsUpgrade mod_http2Upgrade mod_ldapUpgrade mod_proxy_html-debuginfoUpgrade httpd-tools-debuginfoUpgrade mod_lua-debuginfo | Jul 10, 2026 | Jul 7, 2026 |
| Ubuntu | — | Upgrade apache2-bin (Ubuntu Pro)Upgrade apache2-dev (Ubuntu Pro)Upgrade libapache2-mod-md (Ubuntu Pro)Upgrade apache2-ssl-dev (Ubuntu Pro)Upgrade apache2.2-bin (Ubuntu Pro)Upgrade apache2 (Ubuntu Pro)Upgrade apache2Upgrade apache2-utils (Ubuntu Pro)Upgrade apache2-data (Ubuntu Pro) | May 7, 2026 | May 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 4, 2026 |
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