Integer Overflow or Wraparound Affecting libvirt-daemon-driver-network package, versions <0:4.5.0-36.amzn2.3.4


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-AMZN2-LIBVIRTDAEMONDRIVERNETWORK-19810599
  • published15 Sept 2026
  • disclosed20 Aug 2026

Introduced: 20 Aug 2026

CVE-2026-18917  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 libvirt-daemon-driver-network to version 0:4.5.0-36.amzn2.3.4 or higher.
This issue was patched in ALAS2-2026-3910.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libvirt-daemon-driver-network package and not the libvirt-daemon-driver-network package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

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 Base Scores

version 3.1