Linux Kernel: Mehrere Schwachstellen
WID-SEC-2026-2077 · first 25.06.2026 · updated 29.10.2026 · CVSS 8,6
What it is about
Der Kernel stellt den Kern des Linux Betriebssystems dar. Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen und weitere, nicht näher spezifizierte Auswirkungen zu erzielen.
Under what conditions?
Over the network.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen
- einen Denial-of-Service-Zustand herbeizuführen
- weitere, nicht näher spezifizierte Auswirkungen zu erzielen
Am I affected?
Affected according to the BSI:
- F5 F5OS
- Debian Linux
- Amazon Linux 2
- Red Hat Enterprise Linux
- Ubuntu Linux
- SUSE Linux
- IBM QRadar SIEM
- SUSE openSUSE
- F5 F5OS A 1.5.1-1.5.4
- F5 F5OS C 1.8.0-1.8.2
- F5 F5OS C 1.6.0-1.6.4
- Open Source Linux Kernel
and 6 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?
- CVE-2026-53266: exploited in the wild according to CISA, in the catalogue since 18.09.2026.
Information and sources
- Original BSI advisory (WID)
- Debian Security Advisory DLA-4664 vom 2026-07-03 lists.debian.org
- Debian Security Advisory DLA-4665 vom 2026-07-03 lists.debian.org
- openSUSE Security Update OPENSUSE-SU-2026:11175-1 vom 2026-07-03 lists.opensuse.org
- Ubuntu Security Notice USN-8489-1 vom 2026-07-01 ubuntu.com
- Debian Security Advisory DLA-4671 vom 2026-07-05 lists.debian.org
- Kernel CVE Announce Mailingliste lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52944 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52945 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52946 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52947 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52948 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52949 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52950 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52951 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52952 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52953 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52954 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52955 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52956 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52957 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52958 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52959 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52960 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52961 lore.kernel.org
- Linux Kernel CVE Announcement CVE-2026-52962 lore.kernel.org
and 1105 more sources in the original advisory
CVE: CVE-2026-52944, CVE-2026-52945, CVE-2026-52946, CVE-2026-52947, CVE-2026-52948, CVE-2026-52949, CVE-2026-52950, CVE-2026-52951, CVE-2026-52952, CVE-2026-52953, CVE-2026-52954, CVE-2026-52955, CVE-2026-52956, CVE-2026-52957, CVE-2026-52958, CVE-2026-52959, CVE-2026-52960, CVE-2026-52961, CVE-2026-52962, CVE-2026-52963 …
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.