Red Hat Enterprise Linux (pyasn1): Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-2748 · first 11.08.2026 · updated 13.10.2026 · CVSS 7,5
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 (pyasn1) 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
- IBM QRadar SIEM
- RESF Rocky Linux
- SUSE Linux
- Ubuntu Linux
- Oracle Linux
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Migration Toolkit for Applications
- Red Hat Enterprise Linux 9.6 Extended Update Support
and 2 more
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-2026:53363 vom 2026-08-10 access.redhat.com
- Red Hat Security Advisory RHSA-2026:53363 vom 2026-08-10 access.redhat.com
- Red Hat Security Advisory RHSA-2026:53520 vom 2026-08-11 access.redhat.com
- Red Hat Security Advisory RHSA-2026:53365 vom 2026-08-11 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-53364 vom 2026-08-12 linux.oracle.com
- SUSE Security Update SUSE-SU-2026:23006-1 vom 2026-08-12 lists.suse.com
- Rocky Linux Security Advisory RLSA-2026:53363 vom 2026-08-12 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:53364 vom 2026-08-12 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:53365 vom 2026-08-12 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-53365 vom 2026-08-12 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-53363 vom 2026-08-12 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:56347 vom 2026-08-19 access.redhat.com
- SUSE Security Update SUSE-SU-2026:23167-1 vom 2026-08-21 lists.suse.com
- Red Hat Security Advisory RHSA-2026:58547 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58834 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58811 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58820 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58822 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58546 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58548 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:58821 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:59246 vom 2026-08-25 access.redhat.com
- Red Hat Security Advisory RHSA-2026:59247 vom 2026-08-25 access.redhat.com
- Red Hat Security Advisory RHSA-2026:59136 vom 2026-08-24 access.redhat.com
- Red Hat Security Advisory RHSA-2026:59244 vom 2026-08-25 access.redhat.com
and 24 more sources in the original advisory
CVE: CVE-2026-59886
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.