MIT Kerberos: Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-3836 · first 09.10.2026 · updated 27.10.2026 · CVSS 6,5
What it is about
Kerberos ist ein verteilter Netzwerkdienst zur Authentifizierung. MIT Kerberos ist die freie Implementierung des "Kerberos network authentication protocol", des Massachusetts Institute of Technology (MIT). Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in MIT Kerberos ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
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
- SUSE Linux
- MIT Kerberos <1.23
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- MIT Kerberos 1.23
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)
- GitHub Advisory Database vom 2026-10-08 github.com
- GitHub Advisory Database vom 2026-10-08 github.com
- Kerberos 5 GitHub vom 2026-10-08 github.com
- Red Hat Security Advisory RHSA-2026:80481 vom 2026-10-12 access.redhat.com
- SUSE Security Update SUSE-SU-2026:4906-1 vom 2026-10-26 lists.suse.com
CVE: CVE-2026-107708, CVE-2026-107778
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.