Red Hat Enterprise Linux (hivex): Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-0883 · first 31.08.2021 · updated 27.03.2026 · CVSS 4,3
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 in der "hivex" Komponente 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:
- Open Source CentOS
- Amazon Linux 2
- Oracle Linux
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
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-2021:3338 vom 2021-08-31 access.redhat.com
- Oracle Linux Security Advisory ELSA-2021-3338 vom 2021-09-01 linux.oracle.com
- CentOS Security Advisory CESA-2021:3338 vom 2021-09-01 lists.centos.org
- Amazon Linux Security Advisory ALAS-2021-1717 vom 2021-11-04 alas.aws.amazon.com
- Red Hat Security Advisory RHSA-2022:1759 vom 2022-05-10 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-5578 vom 2026-03-26 linux.oracle.com
CVE: CVE-2021-3622
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.