CVE-2007-4643: Doomsday

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

Integer underflow in Doomsday (aka deng) 1.9.0-beta5.1 and earlier allows remote attackers to cause a denial of service (daemon crash) via a PKT_CHAT packet with a data length less than 3, which triggers an erroneous malloc, possibly related to the Sv_HandlePacket function in sv_main.c.

Affected products

• Doomsday Doomsday: up to and including 1.9.0_beta5.1

Published 2007-08-31. Last modified 2026-06-16.