Red Hat Enterprise Linux iperf3: Schwachstelle ermöglicht Denial of Service
WID-SEC-2026-4121 · first 23.10.2026 · updated 26.10.2026 · 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 iperf3 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:
- RESF Rocky Linux
- Red Hat Enterprise Linux <iperf3-3.17.1-6.el10_2.2.src.rpm
- Red Hat Enterprise Linux <iperf3-3.17.1-6.el10_2.2.x86_64.rpm
- Red Hat Enterprise Linux <iperf3-debuginfo-3.17.1-6.el10_2.2.x86_64.rpm
- Red Hat Enterprise Linux <iperf3-debugsource-3.17.1-6.el10_2.2.x86_64.rpm
- Red Hat Enterprise Linux ipfer3 3.22
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 iperf3-3.17.1-6.el10_2.2.src.rpm
- Red Hat Enterprise Linux iperf3-3.17.1-6.el10_2.2.x86_64.rpm
- Red Hat Enterprise Linux iperf3-debuginfo-3.17.1-6.el10_2.2.x86_64.rpm
- Red Hat Enterprise Linux iperf3-debugsource-3.17.1-6.el10_2.2.x86_64.rpm
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-2026:88207 vom 2026-10-22 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:88207 vom 2026-10-23 errata.build.resf.org
CVE: CVE-2026-102253
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.