Red Hat Enterprise Linux (p11-kit): Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-2626 · first 04.08.2026 · updated 23.10.2026 · CVSS 6,2
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein lokaler Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
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 Enterprise Linux
- RESF Rocky Linux
- SUSE Linux
- SUSE openSUSE
- Ubuntu Linux
- Oracle Linux
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux 10
- IBM App Connect Enterprise
- IBM Security Verify Access
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-2026:49667 vom 2026-08-03 access.redhat.com
- Red Hat Security Advisory RHSA-2026:49668 vom 2026-08-03 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:49667 vom 2026-08-04 errata.build.resf.org
- Rocky Linux Security Advisory RLSA-2026:49668 vom 2026-08-04 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-49667 vom 2026-08-05 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:53371 vom 2026-08-11 access.redhat.com
- Red Hat Security Advisory RHSA-2026:54387 vom 2026-08-12 access.redhat.com
- Red Hat Security Advisory RHSA-2026:54760 vom 2026-08-13 access.redhat.com
- Ubuntu Security Notice USN-8687-1 vom 2026-08-27 ubuntu.com
- IBM Security Bulletin 7287318 vom 2026-09-14 www.ibm.com
- IBM Security Bulletin 7290794 vom 2026-10-03 www.ibm.com
- Red Hat Security Advisory RHSA-2026:81201 vom 2026-10-12 access.redhat.com
- Red Hat Security Advisory RHSA-2026:82888 vom 2026-10-14 access.redhat.com
- openSUSE Security Update OPENSUSE-SU-2026:22105-1 vom 2026-10-18 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:24193-1 vom 2026-10-20 lists.suse.com
- SUSE Security Update SUSE-SU-2026:24255-1 vom 2026-10-22 lists.suse.com
CVE: CVE-2026-13757
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.