Red Hat Enterprise Linux (JWCrypto und python-markdown): Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-1610 · first 20.05.2026 · updated 08.10.2026 · CVSS 8,2
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.
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
Am I affected?
Affected according to the BSI:
- Red Hat Ansible Automation Platform 2.5
- Debian Linux
- Red Hat Enterprise Linux
- Red Hat Ansible Automation Platform 2.6
- Ubuntu Linux
- Oracle Linux
- RESF Rocky Linux
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 10.0
- Red Hat Enterprise Linux 9.4
- Red Hat Enterprise Linux 9.6
and 2 more
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- IBM Cognos Analytics 12.1.3 FP2
- IBM Cognos Analytics 12.0.4 FP3
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-2026:19042 vom 2026-05-19 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19197 vom 2026-05-19 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19366 vom 2026-05-19 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19155 vom 2026-05-19 access.redhat.com
- Red Hat Security Advisory RHSA-2026:20674 vom 2026-05-26 access.redhat.com
- Red Hat Security Advisory RHSA-2026:20677 vom 2026-05-26 access.redhat.com
- Red Hat Security Advisory RHSA-2026:20676 vom 2026-05-26 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:19366 vom 2026-05-28 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:19155 vom 2026-05-29 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:19042 vom 2026-05-29 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-19197 vom 2026-06-23 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-19366 vom 2026-06-25 linux.oracle.com
- Ubuntu Security Notice USN-8509-1 vom 2026-07-06 ubuntu.com
- Oracle Linux Security Advisory ELSA-2026-19042 vom 2026-07-15 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:42132 vom 2026-07-20 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-19155 vom 2026-07-20 linux.oracle.com
- Ubuntu Security Notice USN-8614-1 vom 2026-07-30 ubuntu.com
- Red Hat Security Advisory RHSA-2026:59135 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:59136 vom 2026-08-24 access.redhat.com
- IBM Security Bulletin 7287211 vom 2026-09-11 www.ibm.com
- Debian Security Advisory DLA-4827 vom 2026-10-08 lists.debian.org
CVE: CVE-2025-69534, CVE-2026-39373
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.