CVE-2019-12436
samba: NULL pointer dereference in Samba LDAP server leading to crash and Dos
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · June 19, 2019
Updated · January 8, 2026
Description
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.
Statement
This issue did not affect the version of samba as shipped with 'Red Hat Gluster Storage 3' as they did not include support for Active Directory Domain Controller.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Return to the default configuration by running 'samba' with -M standard, however this may consume more memory.
CVSS / CWE
CVSS 3.0 · 6.5CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference