Buffer Over-read Vulnerability in 389 Directory Server by Red Hat
CVE-2026-11789

4.9MEDIUM

Key Information:

Vendor: Red Hat
Status: Red Hat Directory Server 11; Red Hat Directory Server 12; Red Hat Directory Server 13; Red Hat Enterprise Linux 10
Vendor: CVE Published:; 9 June 2026

What is CVE-2026-11789?

A flaw exists in the 389 Directory Server's SMD5 password storage plugin, where an unsigned integer underflow occurs during salt length computation from a crafted password hash that is less than 16 bytes. This vulnerability can lead to a buffer over-read, which disrupts the normal authentication process and potentially crashes the LDAP server. Ensuring proper input validation and updating to the latest patches are crucial for safeguarding against this type of security risk.