CoreDNS: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-0047 · first 08.01.2026 · updated 09.07.2026 · CVSS 7,5
What it is about
CoreDNS ist ein DNS server. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in CoreDNS ausnutzen, um einen Denial of Service Angriff durchzuführen.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
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
- Open Source CoreDNS <1.14.0
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source CoreDNS 1.14.0
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 Security Advisory GHSA-527x-5wrf-22m2 vom 2026-01-08 github.com
- SUSE Security Update SUSE-SU-2026:0142-1 vom 2026-01-19 lists.opensuse.org
- Red Hat Security Advisory RHSA-2026:25127 vom 2026-06-11 access.redhat.com
- Red Hat Security Advisory RHSA-2026:36873 vom 2026-07-09 access.redhat.com
CVE: CVE-2025-68151
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.