CVE-2009-1375: Pidgin

Medium severity, CVSS 5.0. EPSS: 2.3% chance of exploitation in the next 30 days.

The PurpleCircBuffer implementation in Pidgin (formerly Gaim) before 2.5.6 does not properly maintain a certain buffer, which allows remote attackers to cause a denial of service (memory corruption and application crash) via vectors involving the (1) XMPP or (2) Sametime protocol.

Affected products

• Pidgin Pidgin: up to and including 2.5.5; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; …

Published 2009-05-26. Last modified 2026-06-16.