CVE-2018-10858: Canonical Ubuntu Linux

High severity, CVSS 8.8. EPSS: 4.3% chance of exploitation in the next 30 days.

A heap-buffer overflow was found in the way samba clients processed extra long filename in a directory listing. A malicious samba server could use this flaw to cause arbitrary code execution on a samba client. Samba versions before 4.6.16, 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
• Debian Debian Linux: version 9.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Red Hat Virtualization: version 4.0 only
• Red Hat Virtualization Host: version 4.0 only
• Samba Samba: before 4.6.16 (fixed in 4.6.16); 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.