Red Hat Enterprise Linux (libreswan): Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-2518 · first 27.07.2026 · updated 29.10.2026 · CVSS 7,5
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen und möglicherweise die Authentifizierung zu umgehen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
- möglicherweise die Authentifizierung zu umgehen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- Red Hat OpenShift Container Platform
- RESF Rocky Linux
- Oracle Linux
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 10
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)
- Red Hat Security Advisory RHSA-2026:46396 vom 2026-07-26 access.redhat.com
- Red Hat Security Advisory RHSA-2026:46397 vom 2026-07-26 access.redhat.com
- Red Hat Security Advisory RHSA-2026:46398 vom 2026-07-26 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:46396 vom 2026-07-28 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:46397 vom 2026-07-27 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:46986 vom 2026-07-28 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-46398 vom 2026-07-28 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:46398 vom 2026-07-28 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-46397 vom 2026-08-03 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-46396 vom 2026-08-04 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:55449 vom 2026-08-17 access.redhat.com
- Red Hat Security Advisory RHSA-2026:57741 vom 2026-08-20 access.redhat.com
- Red Hat Security Advisory RHSA-2026:61258 vom 2026-08-31 access.redhat.com
- Red Hat Security Advisory RHSA-2026:61779 vom 2026-08-31 access.redhat.com
- Red Hat Security Advisory RHSA-2026:63100 vom 2026-09-08 access.redhat.com
- Red Hat Security Advisory RHSA-2026:63041 vom 2026-09-08 access.redhat.com
- Red Hat Security Advisory RHSA-2026:63044 vom 2026-09-09 access.redhat.com
- Red Hat Security Advisory RHSA-2026:72287 vom 2026-09-28 access.redhat.com
- Red Hat Security Advisory RHSA-2026:82154 vom 2026-10-13 access.redhat.com
- Red Hat Security Advisory RHSA-2026:84887 vom 2026-10-19 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-90492 vom 2026-10-27 linux.oracle.com
CVE: CVE-2026-12413, CVE-2026-14957, CVE-2026-50721, CVE-2026-50722
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.