Ubuntu Linux (ubuntu-pro-client): Mehrere Schwachstellen
WID-SEC-2026-2393 · first 17.07.2026 · updated 02.09.2026 · CVSS 9,0
What it is about
Ubuntu Linux ist die Linux Distribution des Herstellers Canonical. Ein Angreifer kann mehrere Schwachstellen im ubuntu-pro-client von Ubuntu Linux ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen und vertrauliche Informationen offenzulegen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode mit Administratorrechten auszuführen
- vertrauliche Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Ubuntu Linux
- Ubuntu Linux ubuntu-pro-client <19.7ubuntu0.1
- Ubuntu Linux ubuntu-pro-client <37.1ubuntu0~16.04.1
- Ubuntu Linux ubuntu-pro-client <37.1ubuntu0~18.04.1
- Ubuntu Linux ubuntu-pro-client <37.1ubuntu0~20.04.1
- Ubuntu Linux ubuntu-pro-client <37.2ubuntu0.1
- Ubuntu Linux ubuntu-pro-client <37.2ubuntu~22.04.1
- Ubuntu Linux ubuntu-pro-client <37.2ubuntu~24.04.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Ubuntu Linux ubuntu-pro-client 19.7ubuntu0.1
- Ubuntu Linux ubuntu-pro-client 37.1ubuntu0~16.04.1
- Ubuntu Linux ubuntu-pro-client 37.1ubuntu0~18.04.1
- Ubuntu Linux ubuntu-pro-client 37.1ubuntu0~20.04.1
- Ubuntu Linux ubuntu-pro-client 37.2ubuntu0.1
- Ubuntu Linux ubuntu-pro-client 37.2ubuntu~22.04.1
- Ubuntu Linux ubuntu-pro-client 37.2ubuntu~24.04.1
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)
- Ubuntu Security Notice USN-8555-1 vom 2026-07-16 ubuntu.com
- Ubuntu Security Notice USN-8555-2 vom 2026-09-01 ubuntu.com
CVE: CVE-2026-11386, CVE-2026-12391, CVE-2026-9494
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.