PT-2026-50430 · Red Hat · Red Hat Directory Server 11+7

Published 2026-06-17 · Updated 2026-06-17 · CVE-2026-12528

Mitre

CVSS v3.1

5.4

Medium

Base vector

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

A flaw was found in 389 Directory Server in the aclp normalize acltxt() function of aclparse.c. A malformed ACI (Access Control Instruction) string can trigger heap-buffer-overflow writes and reads during ACI parsing. The function fails to validate that the ACI keyword has sufficient length after whitespace stripping, leading to a 1-byte out-of-bounds write and subsequent out-of-bounds reads. An authenticated user with write access to the aci attribute could send a crafted ACI value to silently corrupt heap memory in the directory server process.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-12528

Affected Products

Red Hat Directory Server 11

Red Hat Directory Server 12

Red Hat Directory Server 13

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 3

• https://bugzilla.redhat.com/show_bug.cgi?id=2489835 · Note
• https://access.redhat.com/security/cve/CVE-2026-12528 · Note
• https://github.com/389ds/389-ds-base/pull/7542 · Note