CVE-2026-18917
highpriority · track · 0EPSS 0.002 · 8 %ileDEUSEPSS · scored 2026-10-27
A flaw was found in libvirt. An unprivileged local user could exploit an integer overflow vulnerability in the NodeGetFreePages RPC handler. This flaw allows crafted values to bypass a size check, leading to an undersized memory buffer. Subsequently, real NUMA node data can overwrite this buffer. This heap buffer overflow can corrupt the root libvirt daemon's memory, potentially leading to a denial of service or local privilege escalation.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (9)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2954libvirt: Schwachstelle ermöglicht Privilegieneskalation und DoSDeutsch2026-08-20csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in libvirt ausnutzen, um einen Denial-of-Service-Zustand zu verursachen oder Berechtigungen zu erweitern.
sources
Which sources assert this record, and when.
references (12) nvd
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2026:68509
- https://access.redhat.com/errata/RHSA-2026:68510
- https://access.redhat.com/errata/RHSA-2026:68511
- https://access.redhat.com/errata/RHSA-2026:68513
- https://access.redhat.com/errata/RHSA-2026:68514
- https://access.redhat.com/errata/RHSA-2026:68594
- https://access.redhat.com/errata/RHSA-2026:69114
- https://access.redhat.com/errata/RHSA-2026:69131
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