Red Hat Enterprise Linux (corosync): Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-1358 · first 05.05.2026 · updated 10.08.2026 · CVSS 8,2
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux (corosync) ausnutzen, um einen Denial of Service Angriff durchzuführen.
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
Am I affected?
Affected according to the BSI:
- Debian Linux
- Red Hat Enterprise Linux
- Oracle Linux
- RESF Rocky Linux
- IBM DB2
- Red Hat Enterprise Linux <10
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 10
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-2026:13644 vom 2026-05-04 access.redhat.com
- RedHat Customer Portal vom 2026-05-04 access.redhat.com
- RedHat Customer Portal vom 2026-05-04 access.redhat.com
- Red Hat Security Advisory RHSA-2026:13657 vom 2026-05-05 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:13657 vom 2026-05-06 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:13673 vom 2026-05-06 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:14212 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14216 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14211 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14215 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14214 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14205 vom 2026-05-06 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:13644 vom 2026-05-06 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:14213 vom 2026-05-06 access.redhat.com
- Red Hat Security Advisory RHSA-2026:14210 vom 2026-05-06 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-13673 vom 2026-05-07 linux.oracle.com
- Debian Security Advisory DSA-6261 vom 2026-05-10 lists.debian.org
- Oracle Linux Security Advisory ELSA-2026-13657 vom 2026-05-11 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-13644 vom 2026-05-11 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:19043 vom 2026-05-19 access.redhat.com
- Red Hat Security Advisory RHSA-2026:19200 vom 2026-05-20 access.redhat.com
- Red Hat Security Advisory RHSA-2026:20916 vom 2026-05-26 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:19200 vom 2026-05-28 errata.build.resf.org
- Debian Security Advisory DLA-4608 vom 2026-05-30 lists.debian.org
- Oracle Linux Security Advisory ELSA-2026-19200 vom 2026-06-23 linux.oracle.com
and 1 more sources in the original advisory
CVE: CVE-2026-35091, CVE-2026-35092
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.