CVE-2026-11793 MEDIUM

CVE-2026-11793: 389-ds-base: 389-ds-base: stack buffer overflow in checkprefix() algorithm id parsing

Vendor Red Hat
Product Red Hat Directory Server 11
Weakness CWE-121
Published June 9, 2026
Last update June 9, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 9, 2026 CVE published
June 9, 2026 Record updated