Description
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.
References10
- access.redhat.com/errata/RHSA-2026:68509
- access.redhat.com/errata/RHSA-2026:68510
- access.redhat.com/errata/RHSA-2026:68511
- access.redhat.com/errata/RHSA-2026:68513
- access.redhat.com/errata/RHSA-2026:68514
- access.redhat.com/errata/RHSA-2026:68594
- access.redhat.com/errata/RHSA-2026:69114
- access.redhat.com/errata/RHSA-2026:69131
- access.redhat.com/errata/RHSA-2026:74424
- access.redhat.com/errata/RHSA-2026:75583
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 8 · as of 10 November 2026
- CWE
- CWE-190
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.