CVE-2026-18917
A local attacker can exploit a vulnerability in libvirt to cause a denial-of-service condition or elevate privileges.
CSIRTS triage
- What
- A vulnerability in libvirt allows local attackers to cause denial of service or escalate privileges.
- Who is affected
- Local users on systems running libvirt are affected.
- Urgency
- High priority; privilege escalation capability warrants immediate remediation.
- Action
- Update libvirt to a patched version addressing CVE-2026-18917.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (3)
- high[NEW] [high] libvirt: Vulnerability enables privilege escalation and DoScert-bund · 2026-08-21
- highCVE-2026-18917: A flaw was found in libvirt. An unprivileged local user could exploit an integer overflow vuln…nvd · 2026-08-20
- mediumCVE-2026-18917: Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflowmsrc · 2026-08-11
External references
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[](https://www.csirts.com/cve/CVE-2026-18917)