01 Record
CVE-2026-18917
Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
HighPUBLISHEDCNA: redhat
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
02 Description
Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.18% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 7.3% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Awaiting Analysis. NVD last modified this record on 2026-10-27.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-08-20 09:54Z2 MO AGO
- Last updated
- 2026-10-05 08:29Z24 DAYS AGO
- Reserved
- 2026-08-05
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-190Integer Overflow or WraparoundBase
- Data version
- 5.2
- Document digest
- 349462d25a3edb00b48c77180a6c466b10a7044eabbe27d8b94c695e8019a591
05 Affected products
VendorProductVersionsPlatforms
06 References
- access.redhat.comRHSA-2026:68509https://access.redhat.com/errata/RHSA-2026:68509
- access.redhat.comRHSA-2026:68510https://access.redhat.com/errata/RHSA-2026:68510
- access.redhat.comRHSA-2026:68511https://access.redhat.com/errata/RHSA-2026:68511
- access.redhat.comRHSA-2026:68513https://access.redhat.com/errata/RHSA-2026:68513
- access.redhat.comRHSA-2026:68514https://access.redhat.com/errata/RHSA-2026:68514
- access.redhat.comRHSA-2026:68594https://access.redhat.com/errata/RHSA-2026:68594
- access.redhat.comRHSA-2026:69114https://access.redhat.com/errata/RHSA-2026:69114
- access.redhat.comRHSA-2026:69131https://access.redhat.com/errata/RHSA-2026:69131
- access.redhat.comRHSA-2026:74424https://access.redhat.com/errata/RHSA-2026:74424
- access.redhat.comRHSA-2026:75583https://access.redhat.com/errata/RHSA-2026:75583
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-18917
- bugzilla.redhat.comRHBZ#2520161https://bugzilla.redhat.com/show_bug.cgi?id=2520161
07 Fixed in
AlmaLinux 9
- libvirt Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-client Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-client-qemu Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-common Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-config-network Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-config-nwfilter Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-interface Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-network Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-nodedev Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-nwfilter Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-qemu Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-secret Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-core Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-disk Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-iscsi Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-logical Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-mpath Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-rbd Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-scsi Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-kvm Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-lock Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-log Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-plugin-lockd Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-plugin-sanlock Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-proxy Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-devel Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-docs Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-libs Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-nss Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-ssh-proxy Fixed in 11.10.0-12.7.el9_8.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- libvirt Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-client Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-client-qemu Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-common Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-config-network Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-config-nwfilter Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-interface Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-network Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-nodedev Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-nwfilter Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-qemu Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-secret Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-core Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-disk Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-iscsi Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-logical Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-mpath Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-rbd Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-scsi Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-kvm Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-lock Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-log Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-plugin-lockd Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-plugin-sanlock Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-proxy Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-devel Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-docs Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-libs Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-nss Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-ssh-proxy Fixed in 11.10.0-12.9.el10_2.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- libvirt Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-client Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-client-qemu Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-common Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-config-network Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-config-nwfilter Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-interface Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-network Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-nodedev Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-nwfilter Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-qemu Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-secret Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-core Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-disk Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-iscsi Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-logical Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-mpath Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-rbd Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-driver-storage-scsi Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-kvm Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-lock Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-log Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-plugin-lockd Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-plugin-sanlock Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-daemon-proxy Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-devel Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-docs Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-libs Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-nss Fixed in 11.10.0-12.7.el9_8.alma.1
- libvirt-ssh-proxy Fixed in 11.10.0-12.7.el9_8.alma.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- libvirt Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-client Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-client-qemu Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-common Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-config-network Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-config-nwfilter Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-interface Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-network Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-nodedev Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-nwfilter Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-qemu Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-secret Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-core Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-disk Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-iscsi Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-logical Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-mpath Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-rbd Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-driver-storage-scsi Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-kvm Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-lock Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-log Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-plugin-lockd Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-plugin-sanlock Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-daemon-proxy Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-devel Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-docs Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-libs Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-nss Fixed in 11.10.0-12.9.el10_2.alma.1
- libvirt-ssh-proxy Fixed in 11.10.0-12.9.el10_2.alma.1
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libvirt No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libvirt Fixed in 11.3.0-3+deb13u3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libvirt Fixed in 12.7.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libvirt Fixed in 8.0.0-1ubuntu7.21
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- libvirt Fixed in 10.0.0-2ubuntu8.19
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- libvirt Fixed in 12.0.0-1ubuntu5.5
- libvirt-hwe Fixed in 12.0.0-1ubuntu5.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- libvirt No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- libvirt No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- libvirt No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- libvirt No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.