CVE-2026-18917Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 10 and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:11.10.0-12.9.el10_2 not affected | CNA record |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:10.10.0-8.12.el10_0 not affected | CNA record |
from 0:4.5.0-36.el7_9.7 not affected | CNA record | |
from 8040020260916092751.522a0ee4 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_eus_long_life | from 8040020260916092751.522a0ee4 not affected | CNA record |
from 8080020260910092120.63b34585 not affected | CNA record | |
from 8080020260910092120.63b34585 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus | from 0:10.10.0-7.19.el9_6 not affected | CNA record |
Red Hat Red Hat Enterprise Linux for NVIDIA 26 redhat:enterprise_linux_nvidia | Versions not stated | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:68509vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68510vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68511vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68513vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68514vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:68594vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:69114vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:69131vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:74424vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:75583vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-18917vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2520161issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.