Samba: ctdb fails to do integrity checking of received packets
Published Aug 14, 2026
6.5
MEDIUMCVSS 3.1
EPSS 0.33%
Description
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 products
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||
|---|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 7 | affected |
|
- ≤ 4.2.0
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 10
samba
Not affected
Red Hat Enterprise Linux 6
ctdb
Out of support scope
Red Hat Enterprise Linux 6
samba
Out of support scope
Red Hat Enterprise Linux 6
samba4
Out of support scope
Red Hat Enterprise Linux 7
samba
Fix deferred
Red Hat Enterprise Linux 8
samba
Not affected
Red Hat Enterprise Linux 9
samba
Not affected
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-8
Not affected
Red Hat OpenShift Container Platform 4
openshift/ose-rhel-coreos-9
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 6 | ctdb | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | samba | Out of support scope | n/a |
| Red Hat Enterprise Linux 6 | samba4 | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | samba | Fix deferred | n/a |
| Red Hat Enterprise Linux 8 | samba | Not affected | n/a |
| Red Hat Enterprise Linux 9 | samba | Not affected | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-8 | Not affected | n/a |
| Red Hat OpenShift Container Platform 4 | openshift/ose-rhel-coreos-9 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
CTDB is an optional clustering component of Samba used strictly for multi-node active/active file sharing and is not installed, configured, or running by default on standard Red Hat Enterprise Linux (RHEL) deployments. Red Hat historically supported CTDB in RHEL High Availability and Resilient Storage configurations (including RHEL 6 and RHEL 7) and officially deprecated standalone CTDB usage as of RHEL 8.4 in favor of Pacemaker-managed cluster deployments. Network Architecture Mitigations: For legacy or historical environments actively utilizing CTDB via supported RHEL High Availability or Resilient Storage cluster configurations, Red Hat’s official Support Policies for RHEL High Availability Clusters explicitly mandate that CTDB private interconnect traffic must run on a dedicated, isolated private network segment segregated from client networks. Because the CTDB protocol is unauthenticated by design, untrusted client traffic cannot reach the daemon in any supported architecture. https://access.redhat.com/articles/3278591 https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.4_release_notes/deprecated_functionality#BZ-1916296
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 18, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Aug–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.33% (0.00327) | 23.45th | v5 (v2026.06.15) |
| Aug 15, 2026 | 0.40% (0.00405) | 33.70th | v5 (v2026.06.15) |
References (6)
- https://access.redhat.com/security/cve/CVE-2026-58224 vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2502720 issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory
- https://bugzilla.samba.org/show_bug.cgi?id=16085 Issue TrackingMitigationVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-58224
- https://www.cve.org/CVERecord?id=CVE-2026-58224
- https://www.samba.org/samba/security/CVE-2026-58224-advisory.html Mailing ListVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-58224 | vdb-entryx_refsource_REDHATThird Party AdvisoryVendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2502720 | issue-trackingx_refsource_REDHATIssue TrackingThird Party Advisory | |
| https://bugzilla.samba.org/show_bug.cgi?id=16085 | Issue TrackingMitigationVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-58224 | ||
| https://www.cve.org/CVERecord?id=CVE-2026-58224 | ||
| https://www.samba.org/samba/security/CVE-2026-58224-advisory.html | Mailing ListVendor Advisory |
Change history (0)
No recorded changes yet.