CVE-2026-11789

A flaw was found in 389 Directory Server. The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-11789	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2485422	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 : 2026-06-09 14:16

Updated : 2026-07-23 08:10

NVD link : CVE-2026-11789

Mitre link : CVE-2026-11789

CVE.ORG link : CVE-2026-11789

JSON object : View

Products Affected

redhat

enterprise_linux
389_directory_server
directory_server

CWE

CWE-191

Integer Underflow (Wrap or Wraparound)

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The SMD5 password storage plugin performs unsigned integer underflow when computing salt length from a crafted password hash shorter than 16 bytes, causing a buffer over-read that crashes the LDAP server during authentication."}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en 389 Directory Server. El plugin de almacenamiento de contrase\u00f1as SMD5 realiza un subdesbordamiento de entero sin signo al calcular la longitud del salt a partir de un hash de contrase\u00f1a manipulado de menos de 16 bytes, lo que provoca una lectura excesiva del b\u00fafer que bloquea el servidor LDAP durante la autenticaci\u00f3n."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2A169F6D-88A5-4631-9D30-519350ACFE6E"}, {"criteria": "cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A3DAF61A-58A9-41A6-A4DC-64148055B0C1"}, {"criteria": "cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "904002F4-762C-4CFF-88C4-8FC929774DF8"}, {"criteria": "cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A861110D-0BBC-4052-BBFD-F718F6CD72C5"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}