Vulnerability Details CVE-2026-14940
A heap-buffer-overflow flaw was found in 389 Directory Server (389-ds-base). When
normalizing a Distinguished Name (DN) that contains a legacy-quoted value encoding a
multivalued nested Relative Distinguished Name (RDN), the server can write past the
end of a heap allocation while sorting RDN attribute-value pairs. An unauthenticated
remote attacker can trigger this condition by sending an LDAP operation whose DN
reaches the DN normalization routine, such as a search with a crafted base DN. This
can corrupt heap memory and may cause denial of service.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.2%
CVSS Severity
CVSS v3 Score 5.3
References
Products affected by CVE-2026-14940
-
cpe:2.3:a:redhat:directory_server:11.0
-
cpe:2.3:a:redhat:directory_server:12.0
-
cpe:2.3:a:redhat:directory_server:13.0
-
cpe:2.3:o:redhat:389_directory_server:-
-
cpe:2.3:o:redhat:enterprise_linux:10.0
-
cpe:2.3:o:redhat:enterprise_linux:7.0
-
cpe:2.3:o:redhat:enterprise_linux:8.0
-
cpe:2.3:o:redhat:enterprise_linux:9.0