Red Hat Enterprise Linux (CivetWeb library): Schwachstelle ermöglicht Denial of Service
WID-SEC-2025-2668 · first 25.11.2025 · updated 14.09.2026 · CVSS 5,3
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux 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
- Red Hat Enterprise Linux Advanced Cluster <4.9.1
- Ubuntu Linux
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Red Hat Enterprise Linux Advanced Cluster 4.9.1
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 vom 2025-11-24 access.redhat.com
- Red Hat Security Advisory RHSA-2025:22179 vom 2025-11-26 access.redhat.com
- Red Hat Security Advisory RHSA-2025:23248 vom 2025-12-16 access.redhat.com
- Ubuntu Security Notice USN-8749-1 vom 2026-09-14 ubuntu.com
CVE: CVE-2025-9648
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.