Mariadb · Mariadb · CVE-2021-46664
**Name of the Vulnerable Software and Affected Versions**
MariaDB versions 10.5.9 and earlier
**Description**
The issue is related to errors in pointer handling, which can cause an application crash when a NULL value is encountered in the `aggr` variable within the `sub select postjoin aggr` function. This can lead to a denial of service. The problem is associated with the `sub select postjoin aggr` function for a NULL value of `aggr`.
**Recommendations**
For MariaDB versions 10.5.9 and earlier, consider updating to a version where this issue is resolved, as the current version allows an application crash in `sub select postjoin aggr` for a NULL value of `aggr`.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.