An issue in MariaDB has been announced today (February 4): https://www.openwall.com/lists/oss-security/2020/02/04/1 The announcement says that upstream attempted to fix it in 10.4.12, but also suggested that some packaging changes may be needed to fully address the issue. I don't know if the version in Mageia 7 also contains the affected auth_pam_tool.
as far as I can tell mga7 is not affected. the script mysql_install_db does not contain the named dir/executeables. in cauldron we have a separated package for the pam plugin, which is not installed by default. Adressed issue in cauldron.
Status: NEW => RESOLVEDResolution: (none) => FIXED