CVE-2026-11793

A stack buffer overflow flaw was found in 389 Directory Server. The checkPrefix() function in pw.c copies an attacker-controlled algorithm ID into a 256-byte stack buffer without bounds checking when parsing reversible-encrypted attribute values. An attacker with Directory Manager privileges can crash the LDAP server by storing a crafted credential with an oversized algorithm ID. FORTIFY_SOURCE mitigates this to denial of service only.

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-2026-11793	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2484914	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-09 14:16

Updated : 2026-08-07 06:16

NVD link : CVE-2026-11793

Mitre link : CVE-2026-11793

CVE.ORG link : CVE-2026-11793

JSON object : View

Products Affected

redhat

389_directory_server

CWE

CWE-121

Stack-based Buffer Overflow

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