Samba: Mehrere Schwachstellen
WID-SEC-2026-1686 · first 27.05.2026 · updated 16.10.2026 · CVSS 10,0
What it is about
Samba ist eine Open Source Software Suite, die Druck- und Dateidienste für SMB/CIFS Clients implementiert. Ein Angreifer kann mehrere Schwachstellen in Samba ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode auszuführen
- einen Denial of Service Angriff durchzuführen
- Dateien zu manipulieren
- Sicherheitsvorkehrungen zu umgehen
Am I affected?
Affected according to the BSI:
- Dell NetWorker
- Debian Linux
- Amazon Linux 2
- Red Hat Enterprise Linux
- Fedora Linux
- Ubuntu Linux
- SUSE Linux
- Oracle Linux
- IBM QRadar SIEM
- RESF Rocky Linux
- Dell Avamar
- Red Hat OpenShift Container Platform
and 8 more
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Samba 4.24.3
- Open Source Samba 4.23.8
- Open Source Samba 4.22.10
- Red Hat OpenShift Container Platform 4.21.22
- Red Hat OpenShift Container Platform 4.20.27
- Red Hat OpenShift Container Platform 4.19.36
- Red Hat OpenShift Container Platform 4.16.70
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Red Hat Security Advisory RHSA-2026:29863 vom 2026-07-02 access.redhat.com
- Red Hat Security Advisory RHSA-2026:29833 vom 2026-06-30 access.redhat.com
- Red Hat Security Advisory RHSA-2026:29799 vom 2026-06-30 access.redhat.com
- Samba 4.22.10 - Release Notes vom 2026-05-26 www.samba.org
- Samba 4.23.8 - Release Notes vom 2026-05-26 www.samba.org
- Samba 4.24.3 - Release Notes vom 2026-05-26 www.samba.org
- Ubuntu Security Notice USN-8306-1 vom 2026-05-26 ubuntu.com
- Debian Security Advisory DSA-6297 vom 2026-05-27 lists.debian.org
- SUSE Security Update SUSE-SU-2026:2076-1 vom 2026-05-26 lists.suse.com
- SUSE Security Update SUSE-SU-2026:2074-1 vom 2026-05-26 lists.suse.com
- SUSE Security Update SUSE-SU-2026:2073-1 vom 2026-05-26 lists.suse.com
- SUSE Security Update SUSE-SU-2026:2072-1 vom 2026-05-26 lists.suse.com
- SUSE Security Update SUSE-SU-2026:2071-1 vom 2026-05-26 lists.suse.com
- Fedora Security Advisory FEDORA-2026-FC81581A79 vom 2026-05-29 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-9B08621BDC vom 2026-05-29 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-7567819345 vom 2026-05-29 bodhi.fedoraproject.org
- SUSE Security Update SUSE-SU-2026:2108-1 vom 2026-05-29 lists.suse.com
- Red Hat Security Advisory RHSA-2026:22644 vom 2026-06-03 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-22644 vom 2026-06-04 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:22963 vom 2026-06-03 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:22644 vom 2026-06-09 errata.build.resf.org
- SUSE Security Update SUSE-SU-2026:22045-1 vom 2026-06-09 lists.suse.com
- Red Hat Security Advisory RHSA-2026:25049 vom 2026-06-10 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:22963 vom 2026-06-11 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:25049 vom 2026-06-13 errata.build.resf.org
and 35 more sources in the original advisory
CVE: CVE-2026-1933, CVE-2026-2340, CVE-2026-3012, CVE-2026-3238, CVE-2026-4408, CVE-2026-4480
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.