CVE-2004-0837: Debian Linux

Low severity, CVSS 2.6. EPSS: 4.9% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 3.0 only
• MySQL MySQL: version 4.1.0 only
• Oracle MySQL: from 3.20, before 3.23.49 (fixed in 3.23.49); from 4.0.0, before 4.0.21 (fixed in 4.0.21)

Published 2004-11-03. Last modified 2026-06-16.