MySQL 4.x before 4.0.21, and 3.x before 3.23.49, allows attackers to cause a denial of service (crash or hang) via multiple threads that simultaneously alter MERGE table UNIONs.
| Software | From | Fixed in |
|---|---|---|
| mysql / mysql | 4.1.0 | 4.1.0.x |
| oracle / mysql | 3.20 | 3.23.49 |
| oracle / mysql | 4.0.0 | 4.0.21 |
| debian / debian_linux | 3.0 | 3.0.x |