---
id: CVE-2026-15041
title: >-
  389-ds-base: 389-ds-base: non-constant-time comparison in pbkdf2-sha256
  password verification
summary: >-
  A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password
  verification function uses standard memcmp() for comparing password hashes
  instead of a constant-time comparison function. A remote attacker could
  potentially use timin…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-208
vendor: Red Hat
product: 'redhat-ds:11/389-ds-base'
affected:
  - 'redhat-ds:11/389-ds-base (all versions)'
  - 'redhat-ds:12/389-ds-base (all versions)'
  - 389-ds-base (all versions)
  - 389-ds-base (all versions)
  - 389-ds-base
  - 389-ds-base (all versions)
  - '389-ds:1.4/389-ds-base (all versions)'
  - 389-ds-base (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-07-08T13:44:08.886989Z'
published: '2026-07-08'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:54:13.266Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-15041'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-15041'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2498022'
    label: RHBZ#2498022
tags:
  - cve.org
epss: 0.00359
epssPercentile: 0.29811
ingestedAt: '2026-11-06T18:00:12.494Z'
---

## Overview

A flaw was found in 389 Directory Server. The PBKDF2-SHA256 password verification function uses standard memcmp() for comparing password hashes instead of a constant-time comparison function. A remote attacker could potentially use timing measurements of LDAP bind attempts to infer partial hash information, though practical exploitation is extremely difficult due to PBKDF2 computational overhead.

## Affected

- `redhat-ds:11/389-ds-base (all versions)`
- `redhat-ds:12/389-ds-base (all versions)`
- `389-ds-base (all versions)`
- `389-ds-base (all versions)`
- `389-ds-base`
- `389-ds-base (all versions)`
- `389-ds:1.4/389-ds-base (all versions)`
- `389-ds-base (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

If possible, configure 389 Directory Server to use an alternative password storage scheme (e.g., SSHA512 or GOST-Yescrypt) which uses constant-time comparison.