Red Hat Enterprise Linux (libgit2): Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-3333 · first 14.09.2026 · updated 21.09.2026 · CVSS 7,5
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 10
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?
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 RHSA-2026:67286 vom 2026-09-13 access.redhat.com
- Red Hat Security Advisory RHSA-2026:67285 vom 2026-09-14 access.redhat.com
- Red Hat Security Advisory RHSA-2026:69096 vom 2026-09-21 access.redhat.com
- Red Hat Security Advisory RHSA-2026:69097 vom 2026-09-21 access.redhat.com
- Red Hat Security Advisory RHSA-2026:69109 vom 2026-09-21 access.redhat.com
CVE: CVE-2026-53587
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.