CVE-2020-10730: Debian Linux

Medium severity, CVSS 6.5. EPSS: 2.4% chance of exploitation in the next 30 days.

A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 31 only
• Opensuse Leap: version 15.1 only; version 15.2 only
• Red Hat Storage: version 3.0 only
• Samba Samba: from 4.5.0, before 4.10.17 (fixed in 4.10.17); from 4.11.0, before 4.11.11 (fixed in 4.11.11); from 4.12.0, before 4.12.4 (fixed in 4.12.4)

Published 2020-07-07. Last modified 2026-06-17.