Red Hat Enterprise Linux (perl-Archive-Tar, httplib2): Mehrere Schwachstellen ermöglichen Denial of Service
WID-SEC-2026-2588 · first 30.07.2026 · updated 05.10.2026 · CVSS 7,5
What it is about
Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen 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:
- Debian Linux
- Red Hat Enterprise Linux
- IBM QRadar SIEM
- RESF Rocky Linux
- SUSE Linux
- SUSE openSUSE
- Ubuntu Linux
- Oracle Linux
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
and 1 more
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-2026:48225 vom 2026-07-29 access.redhat.com
- Red Hat Security Advisory RHSA-2026:48585 vom 2026-07-29 access.redhat.com
- Red Hat Security Advisory RHSA-2026:48615 vom 2026-07-29 access.redhat.com
- Red Hat Security Advisory RHSA-2026:47736 vom 2026-07-30 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:48225 vom 2026-07-30 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:48605 vom 2026-07-30 access.redhat.com
- Red Hat Security Advisory RHSA-2026:48604 vom 2026-07-30 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:47736 vom 2026-07-30 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-47736 vom 2026-07-31 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-48585 vom 2026-08-01 linux.oracle.com
- Rocky Linux Security Advisory RLSA-2026:48585 vom 2026-07-31 errata.build.resf.org
- Red Hat Security Advisory RHSA-2026:49525 vom 2026-08-03 access.redhat.com
- Red Hat Security Advisory RHSA-2026:49524 vom 2026-08-03 access.redhat.com
- Red Hat Security Advisory RHSA-2026:49523 vom 2026-08-03 access.redhat.com
- Oracle Linux Security Advisory ELSA-2026-49523 vom 2026-08-03 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-49525 vom 2026-08-03 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2026-49524 vom 2026-08-03 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:49911 vom 2026-08-04 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50340 vom 2026-08-04 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50653 vom 2026-08-05 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50357 vom 2026-08-04 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50479 vom 2026-08-05 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50655 vom 2026-08-05 access.redhat.com
- Red Hat Security Advisory RHSA-2026:50317 vom 2026-08-05 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:49525 vom 2026-08-04 errata.build.resf.org
and 17 more sources in the original advisory
CVE: CVE-2026-59939, CVE-2026-9538
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.