OpenSSH: Mehrere Schwachstellen
WID-SEC-2026-2039 · first 23.06.2026 · updated 26.10.2026 · CVSS 6,5
What it is about
OpenSSH ist eine Open Source Implementierung des Secure Shell Protokolls. Ein Angreifer kann mehrere Schwachstellen in OpenSSH ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.
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
- einen Denial of Service Angriff durchzuführen
- Sicherheitsmaßnahmen zu umgehen
- Daten zu manipulieren oder vertrauliche Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- Fedora Linux
- RESF Rocky Linux
- Open Source OpenSSH 10.2p1-10.1.hum1
- Open Source OpenSSH 9.9p1-22.el10_2
- Oracle Linux
- IBM Security Verify Access
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Install the updates provided by the vendor; details in the sources below.
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)
- GitHub Advisory Database vom 2026-06-22 github.com
- GitHub Advisory Database vom 2026-06-22 github.com
- GitHub Advisory Database vom 2026-06-22 github.com
- RedHat Bugzilla vom 2026-06-22 bugzilla.redhat.com
- RedHat Bugzilla vom 2026-06-22 bugzilla.redhat.com
- RedHat Bugzilla vom 2026-06-22 bugzilla.redhat.com
- Fedora Security Advisory FEDORA-2026-A2C682A975 vom 2026-07-07 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-95B955A09B vom 2026-07-07 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-A80275B42D vom 2026-07-07 bodhi.fedoraproject.org
- Red Hat Security Advisory RHSA-2026:47757 vom 2026-07-29 access.redhat.com
- Red Hat Security Advisory RHSA-2026:47755 vom 2026-07-30 access.redhat.com
- Red Hat Security Advisory RHSA-2026:47756 vom 2026-07-30 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-47757 vom 2026-07-30 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:47757 vom 2026-07-30 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:47756 vom 2026-07-30 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:47755 vom 2026-07-30 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-47755 vom 2026-08-01 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:54387 vom 2026-08-12 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-47756 vom 2026-08-15 oss.oracle.com
- IBM Security Bulletin 7290794 vom 2026-10-03 www.ibm.com
- Red Hat Security Advisory RHSA-2026:76748 vom 2026-10-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:76993 vom 2026-10-07 access.redhat.com
- Red Hat Security Advisory RHSA-2026:80513 vom 2026-10-12 access.redhat.com
- Red Hat Security Advisory RHSA-2026:82749 vom 2026-10-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:82753 vom 2026-10-14 access.redhat.com
and 35 more sources in the original advisory
CVE: CVE-2026-55653, CVE-2026-55654, CVE-2026-55655
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.