Red Hat Enterprise Linux (cjose): Schwachstelle ermöglicht Denial of Service und Manipulation von Daten
WID-SEC-2026-3626 · first 29.09.2026 · updated 12.10.2026 · CVSS 8,2
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux (cjose) ausnutzen, um einen Denial of Service Angriff durchzuführen, und um Daten zu manipulieren.
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
- Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- RESF Rocky Linux
- SUSE Linux
- Oracle Linux
- Red Hat Enterprise Linux Update Services for SAP Solutions <9.2
- Red Hat Enterprise Linux Update Services for SAP Solutions <9.4
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Red Hat Enterprise Linux Update Services for SAP Solutions 9.2
- Red Hat Enterprise Linux Update Services for SAP Solutions 9.4
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-2026:73017 vom 2026-09-28 access.redhat.com
- Red Hat Security Advisory RHSA-2026:73018 vom 2026-09-28 access.redhat.com
- Red Hat Security Advisory RHSA-2026:73128 vom 2026-09-29 access.redhat.com
- Red Hat Security Advisory RHSA-2026:73129 vom 2026-09-29 access.redhat.com
- SUSE Security Update SUSE-SU-2026:23910-1 vom 2026-09-29 lists.suse.com
- Red Hat Security Advisory RHSA-2026:77369 vom 2026-10-07 access.redhat.com
- Red Hat Security Advisory RHSA-2026:77372 vom 2026-10-07 access.redhat.com
- Red Hat Security Advisory RHSA-2026:77371 vom 2026-10-07 access.redhat.com
- Red Hat Security Advisory RHSA-2026:77370 vom 2026-10-07 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-79122 vom 2026-10-09 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:79122 vom 2026-10-10 errata.build.resf.org
CVE: CVE-2026-53938
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.