---
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
  - url: 'https://access.redhat.com/errata/RHSA-2026:86618'
    label: 'RHSA-2026:86618'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58224.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-58224'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-58224'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00344
epssPercentile: 0.27739
ingestedAt: '2026-08-31T13:08:32.989Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-18T02:05:45.915362Z'
patched:
  - ceph_storage 9.2
---

## 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.

## Vendor advisories

- **RHSA-2026:86618** · Red Hat · fixed in: Red Hat Ceph Storage 9.2 · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:86618)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-58224.json)