Linux Kernel (Fragnesia): Schwachstelle ermöglicht Erlangen von Administratorrechten
WID-SEC-2026-1530 · first 15.05.2026 · updated 29.10.2026 · CVSS 7,8
What it is about
Der Kernel stellt den Kern des Linux Betriebssystems dar. Ein lokaler Angreifer kann eine Schwachstelle in Linux Kernel ausnutzen, um Administratorrechte zu erlangen.
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
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- Google Container-Optimized OS
- Dell NetWorker
- Amazon Linux 2
- Red Hat Enterprise Linux
- Fedora Linux
- Ubuntu Linux
- SUSE Linux
- Red Hat OpenShift Container Platform
- SUSE openSUSE
- Dell Avamar
- Siemens SIMATIC S7 1500 CPU
- Open Source Linux Kernel
and 13 more
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Red Hat OpenShift Container Platform 4.18.43
- Red Hat OpenShift Container Platform 4.13.67
- Red Hat OpenShift Container Platform 4.12.91
- Red Hat OpenShift 4.21.19
- IBM QRadar SIEM 7.5.0 UP15 IF04
- Dell Secure Connect Gateway 5.36.00.16
Is the vulnerability already being exploited?
- CVE-2026-46300: exploited in the wild according to CISA, in the catalogue since 28.10.2026.
Information and sources
- Original BSI advisory (WID)
- Oracle Linux Security Advisory ELSA-2026-50353 vom 2026-07-01 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-19568 vom 2026-07-01 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-18587 vom 2026-07-01 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-21556 vom 2026-07-01 linux.oracle.com
- SUSE Security Update SUSE-SU-2026:22425-1 vom 2026-07-03 lists.suse.com
- Ubuntu Security Notice USN-8497-1 vom 2026-07-02 ubuntu.com
- Ubuntu Security Notice USN-8499-1 vom 2026-07-02 ubuntu.com
- Ubuntu Security Notice USN-8501-1 vom 2026-07-02 ubuntu.com
- Oracle Linux Security Advisory ELSA-2026-24381 vom 2026-06-30 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-25217 vom 2026-06-30 linux.oracle.com
- Ubuntu Security Notice USN-8489-1 vom 2026-07-01 ubuntu.com
- Red Hat Security Advisory RHSA-2026:28887 vom 2026-07-01 access.redhat.com
- Red Hat Bugzilla Bug 2477015 vom 2026-05-13 bugzilla.redhat.com
- PoC CVE-2026-46300 vom 2026-05-13 github.com
- Red Hat Security Advisory vom 2026-05-13 access.redhat.com
- Fedora Security Advisory FEDORA-2026-CCCB681166 vom 2026-05-13 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-EC1C523FDB vom 2026-05-14 bodhi.fedoraproject.org
- Fedora Security Advisory FEDORA-2026-4462EFC052 vom 2026-05-13 bodhi.fedoraproject.org
- Red Hat Security Advisory RHSA-2026:33486 vom 2026-06-30 access.redhat.com
- SUSE Security Update SUSE-SU-2026:1909-1 vom 2026-05-18 lists.suse.com
- Amazon Linux Security Advisory ALAS2-2026-3307 vom 2026-05-15 alas.aws.amazon.com
- Amazon Linux Security Advisory ALAS2KERNEL-5.10-2026-119 vom 2026-05-15 alas.aws.amazon.com
- Amazon Linux Security Advisory ALAS2KERNEL-5.15-2026-103 vom 2026-05-15 alas.aws.amazon.com
- SUSE Security Update SUSE-SU-2026:1904-1 vom 2026-05-18 lists.suse.com
- SUSE Security Update SUSE-SU-2026:1907-1 vom 2026-05-18 lists.suse.com
and 212 more sources in the original advisory
CVE: CVE-2026-46300
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.