[NEW] [high] Ubuntu Linux (ubuntu-pro-client): Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in the ubuntu-pro-client of Ubuntu Linux to execute arbitrary program code with administrator privileges and disclose confidential information.
CSIRTS triage
- What
- Multiple vulnerabilities allow an attacker to execute arbitrary program code with administrator privileges and disclose confidential information.
- Who is affected
- Deployments of Ubuntu Linux with the ubuntu-pro-client.
- Urgency
- Remediation is urgent due to the high severity and potential for serious impacts including privilege escalation.
- Action
- Update the ubuntu-pro-client to the latest version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2393
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-113860.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
- Low exploitation riskCVE-2026-123910.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.
- Low exploitation riskCVE-2026-94940.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-11386 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-12391 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-9494 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- mediumCVE-2026-9494: An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-…nvd
- mediumCVE-2026-12391: An insecure symlink following vulnerability exists in Canonical ubuntu-pro-client (formerly ub…nvd
- criticalCVE-2026-11386: An input validation and injection vulnerability exists in Canonical ubuntu-pro-client (formerl…nvd
- unknownUSN-8555-1: Ubuntu Advantage Tools (pro client) vulnerabilitiesubuntu
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