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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-14940	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2497697	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

OR	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:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

History

No history.

Information

Published : 2026-07-07 15:16

Updated : 2026-07-09 20:20

NVD link : CVE-2026-14940

Mitre link : CVE-2026-14940

CVE.ORG link : CVE-2026-14940

JSON object : View

Products Affected

redhat

enterprise_linux
389_directory_server
directory_server

CWE

CWE-122

Heap-based Buffer Overflow

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