LibreOffice: Mehrere Schwachstellen
WID-SEC-2026-3521 · first 23.09.2026 · updated 23.10.2026 · CVSS 6,1
What it is about
LibreOffice ist eine leistungsfähige Office-Suite, voll kompatibel mit den Programmen anderer großer Office-Anbieter, für verbreitete Betriebssysteme wie Windows, GNU/Linux und Apple Mac OS X geeignet. LibreOffice bietet sechs Anwendungen für die Erstellung von Dokumenten und zur Datenverarbeitung: Writer, Calc, Impress, Draw, Base und Math. Ein lokaler Angreifer kann mehrere Schwachstellen in LibreOffice ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren oder Informationen offenzulegen.
Under what conditions?
Only with access to the device or an account on it. Often the second step after a phishing email.
What can happen in the worst case
An attacker could use the vulnerability to
- einen Denial of Service Angriff durchzuführen
- Daten zu manipulieren oder Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Amazon Linux 2
- Red Hat Enterprise Linux
- RESF Rocky Linux
- Ubuntu Linux
- Oracle Linux
- Open Source LibreOffice <26.2.5
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source LibreOffice 26.2.5
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)
- LibreOffice Security Advisories vom 2026-09-22 www.libreoffice.org
- Ubuntu Security Notice USN-8868-1 vom 2026-10-05 ubuntu.com
- Amazon Linux Security Advisory ALAS2LIBREOFFICE-2026-010 vom 2026-10-13 alas.aws.amazon.com
- Red Hat Security Advisory RHSA-2026:82013 vom 2026-10-13 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:82013 vom 2026-10-14 errata.build.resf.org
- Oracle Linux Security Advisory ELSA-2026-82013 vom 2026-10-14 linux.oracle.com
- Red Hat Security Advisory RHSA-2026:88164 vom 2026-10-22 access.redhat.com
- Rocky Linux Security Advisory RLSA-2026:88164 vom 2026-10-23 errata.build.resf.org
CVE: CVE-2026-63272, CVE-2026-63273, CVE-2026-63274, CVE-2026-63275, CVE-2026-63276, CVE-2026-63279, CVE-2026-63278
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.