CVE-2019-12436: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.

Affected products

• Canonical Ubuntu Linux: version 19.04 only
• Samba Samba: from 4.10.0, before 4.10.5 (fixed in 4.10.5)

Published 2019-06-19. Last modified 2026-06-17.