CVE-2007-1216: Canonical Ubuntu Linux

High severity, CVSS 9.0. EPSS: 9.9% chance of exploitation in the next 30 days.

Double free vulnerability in the GSS-API library (lib/gssapi/krb5/k5unseal.c), as used by the Kerberos administration daemon (kadmind) in MIT krb5 before 1.6.1, when used with the authentication method provided by the RPCSEC_GSS RPC library, allows remote authenticated users to execute arbitrary code and modify the Kerberos key database via a message with an "an invalid direction encoding".

Affected products

• Canonical Ubuntu Linux: version 5.10 only; version 6.06 only; version 6.10 only
• Debian Debian Linux: version 3.1 only; version 4.0 only
• Mit Kerberos 5: before 1.6.1 (fixed in 1.6.1)

Published 2007-04-06. Last modified 2026-06-16.