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

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-2026-11793?

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.