[UPDATE] [mittel] libvirt: Mehrere Schwachstellen ermöglichen
Ein lokaler Angreifer kann mehrere Schwachstellen in libvirt ausnutzen, um Administratorrechte zu erlangen und vertrauliche Informationen offenzulegen.
CSIRTS triage
- What
- Multiple vulnerabilities in libvirt allow local attackers to gain administrator privileges and disclose confidential information.
- Who is affected
- Systems running libvirt with local user access are affected.
- Urgency
- Medium priority; requires local access but results in privilege escalation and information disclosure.
- Action
- Update libvirt to patched versions addressing CVE-2026-63622 and CVE-2026-63623.
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-2026-2724
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-2026-636220.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-636230.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-63622 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-63623 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- mediumCVE-2026-63623: Libvirt: information disclosure via world-readable storage volume images during clone/convertmsrc
- highCVE-2026-63622: A flaw was found in libvirt. A local attacker, specifically a process running as the confined …nvd
- mediumCVE-2026-63623: A flaw was found in libvirt. During storage volume clone or convert operations, newly created …nvd
Recent advisories for libvirt
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-77159: A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The fun…nvd · 2026-09-11
- high[NEU] [hoch] libvirt: Schwachstelle ermöglicht Privilegieneskalationcert-bund · 2026-09-11
- high[UPDATE] [hoch] libvirt: Schwachstelle ermöglicht Privilegieneskalation und DoScert-bund · 2026-09-10
- medium[NEU] [mittel] libvirt: Schwachstelle ermöglicht Denial of Servicecert-bund · 2026-09-08
- medium[UPDATE] [mittel] libvirt: Schwachstelle ermöglicht Offenlegung von Informationencert-bund · 2026-09-08
- unknownCVE-2026-84194: LibreNMS versions >= 23.10.0 and < 26.2.0 (fixed in 26.4.0) contain an authenticated OS comman…nvd · 2026-09-01
More from CERT-Bund (BSI) Security Advisories
- high[UPDATE] [hoch] Red Hat Enterprise Linux (postgis, virtuoso-opensource): Mehrere Schwachstellen2026-09-11
- medium[UPDATE] [mittel] Red Hat Enterprise Linux: Mehrere Schwachstellen2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Schwachstelle ermöglicht Denial of Service2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-11
- high[UPDATE] [hoch] OpenSSL: Mehrere Schwachstellen2026-09-11