CVE-2018-10918: Canonical Ubuntu Linux

Medium severity, CVSS 6.5. EPSS: 2.5% chance of exploitation in the next 30 days.

A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Samba Samba: from 4.7.0, before 4.7.9 (fixed in 4.7.9); from 4.8.0, before 4.8.4 (fixed in 4.8.4)

Published 2018-08-22. Last modified 2026-06-17.