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Fencer Vulns
medium 6.5

CVE-2026-58224 json

Samba: ctdb fails to do integrity checking of received packets

published 2026-08-14 2 mo ago modified 2026-11-05 3 d ago also EUVD-2026-58669

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

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, 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.

Patch / fix

  • Red Hat Red Hat Ceph Storage 9.2 1790843527
  • samba Debian 13 2:4.22.10+dfsg-0+deb13u2
  • samba Debian 14 2:4.24.5+dfsg-1

debian advisories DEBIAN-CVE-2026-58224

  • samba Ubuntu 22.04 LTS 2:4.15.13+dfsg-0ubuntu1.13
  • samba Ubuntu 24.04 LTS 2:4.19.5+dfsg-4ubuntu9.7
  • samba Ubuntu 26.04 LTS 2:4.23.6+dfsg-1ubuntu2.2

ubuntu advisories UBUNTU-CVE-2026-58224

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 4.22.11+git.552.66cfeb7de0a-160000.1.1
  • samba Linux Micro 6.2 4.22.9+git.538.af6cb4fb2e-160000.1.1
  • samba SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS, SLE High Availability Extension 12 SP5 4.15.13+git.729.a8ce057e8d-3.109.1
  • samba Enterprise Storage 7.1 4.15.13+git.808.eeca19f5e1-150300.3.106.1
  • samba SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 4.17.12+git.581.f49579c6cd-150500.3.42.1
  • samba SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE High Availability Extension 15 SP6 4.19.8+git.501.67274891bc-150600.3.29.1
  • samba SLE Module for Basesystem 15 SP7, SLE High Availability Extension 15 SP7 4.21.10+git.533.31d7e5508d-150700.3.29.1
  • samba SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +4 more 4.15.13+git.808.eeca19f5e1-150400.3.52.1

suse advisories SUSE-SU-2026:23003-1SUSE-SU-2026:23129-1SUSE-SU-2026:23152-1SUSE-SU-2026:22977-1SUSE-SU-2026:3367-1SUSE-SU-2026:3366-1

  • samba openSUSE Leap 16.0 4.22.11+git.552.66cfeb7de0a-160000.1.1
  • samba openSUSE Tumbleweed 4.24.5+git.481.dba78dbdea-1.1
  • samba openSUSE Leap 16.0 4.22.9+git.538.af6cb4fb2e-160000.1.1

opensuse advisories openSUSE-SU-2026:21540-1openSUSE-SU-2026:11431-1openSUSE-SU-2026:21475-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-58224 updated cvss 6.5

samba: CTDB fails to do integrity checking of received packets

  • Red Hat Enterprise Linux 6 ctdb, samba, samba4, samba4-dc, ctdb-tests, samba-swat, +19 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +18 more
    affected: no fix available “Fix deferred”
  • Red Hat Ceph Storage 9.2 rhceph/rhceph-9-rhel10 1790843527
    fixed: vendor fix RHSA-2026:86618
  • Red Hat Ceph Storage 9.2 rhceph/alloy-rhel10 1790774976, rhceph/grafana-rhel10 1790774121, rhceph/keepalived-rhel10 1790842990, rhceph/oauth2-proxy-rhel10 1790774021, rhceph/snmp-notifier-rhel10 1790773439, rhceph/rhceph-haproxy-rhel10 1790846345 Red Hat Enterprise Linux 8 ctdb, samba, libnetapi, ctdb-tests, samba-libs, samba-pidl, +24 more Red Hat Enterprise Linux 9 ctdb, samba, libldb, ldb-tools, libnetapi, samba-libs, +27 more Red Hat Enterprise Linux 10 samba Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Ceph Storage 9.2
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-353 Missing Support for Integrity Check

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.