MySQL 5.1 before 5.1.51 and 5.5 before 5.5.6 allows remote authenticated users to cause a denial of service (infinite loop) via multiple invocations of a (1) prepared statement or (2) stored procedure that creates a query with nested JOIN statements.

MySQL 5.1 before 5.1.51 and 5.5 before 5.5.6 allows remote authenticated users to cause a denial of service (mysqld server crash) by performing a user-variable assignment in a logical expression that is calculated and stored in a temporary table for GROUP BY, then causing the expression value to be used after the table is created, which causes the expression to be re-evaluated instead of accessing its value from the table.

MySQL 5.0 before 5.0.92, 5.1 before 5.1.51, and 5.5 before 5.5.6 does not properly propagate type errors, which allows remote attackers to cause a denial of service (server crash) via crafted arguments to extreme-value functions such as (1) LEAST and (2) GREATEST, related to KILL_BAD_DATA and a "CREATE TABLE ... SELECT."

Oracle MySQL 5.1 before 5.1.49 and 5.5 before 5.5.5 sends an OK packet when a LOAD DATA INFILE request generates SQL errors, which allows remote authenticated users to cause a denial of service (mysqld daemon crash) via a crafted request.

Oracle MySQL 5.1 before 5.1.49 and 5.5 before 5.5.5 allows remote authenticated users to cause a denial of service (mysqld daemon crash) by using the HANDLER interface and performing "alternate reads from two indexes on a table," which triggers an assertion failure.