CVE-2026-18917

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 v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-18917
https://bugzilla.redhat.com/show_bug.cgi?id=2520161

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-20 10:16

Updated : 2026-09-15 07:16

NVD link : CVE-2026-18917

Mitre link : CVE-2026-18917

CVE.ORG link : CVE-2026-18917

JSON object : View

Products Affected

No product.

CWE

CWE-190

Integer Overflow or Wraparound

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