---
id: CVE-2026-58224
title: 'A flaw was found in Samba''s CTDB, the clustered database service used by Samba'
summary: >-
  A flaw was found in Samba's CTDB, the clustered database service used by
  Samba. Insufficient integrity validation of received CTDB protocol packets
  allows malformed packets containing invalid field lengths, improperly
  terminated strings,…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-353
vendor: samba
product: samba
affected:
  - samba <= 4.2.0
  - enterprise_linux = 6.0
  - enterprise_linux = 7.0
published: '2026-08-14'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T14:27:26.983'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58224'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-58224'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2502720'
    label: secalert@redhat.com
  - url: 'https://bugzilla.samba.org/show_bug.cgi?id=16085'
    label: secalert@redhat.com
  - url: 'https://www.samba.org/samba/security/CVE-2026-58224-advisory.html'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00327
epssPercentile: 0.23158
ingestedAt: '2026-08-31T13:08:32.989Z'
---

## Overview

A flaw was found in Samba's CTDB, the clustered database service used by Samba. Insufficient integrity validation of received CTDB protocol packets allows malformed packets containing invalid field lengths, improperly terminated strings, or inconsistent packet sizes to be processed without adequate bounds checking. A remote attacker with access to the CTDB private network may trigger a denial of service through process crashes or excessive memory consumption and, in limited cases, disclose adjacent memory contents.

## Affected

- `samba <= 4.2.0`
- `enterprise_linux = 6.0`
- `enterprise_linux = 7.0`

## Remediation

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