Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3910
Advisory Released Date: 2026-09-14
Advisory Updated Date: 2026-09-14
Severity:
Important
Issue Overview:
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. (CVE-2026-18917)
Affected Packages:
libvirt
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update libvirt or yum update --advisory ALAS2-2026-3910 to update your system.
New Packages:
aarch64:
libvirt-4.5.0-36.amzn2.3.4.aarch64
libvirt-docs-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-config-network-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-qemu-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-kvm-4.5.0-36.amzn2.3.4.aarch64
libvirt-daemon-lxc-4.5.0-36.amzn2.3.4.aarch64
libvirt-client-4.5.0-36.amzn2.3.4.aarch64
libvirt-libs-4.5.0-36.amzn2.3.4.aarch64
libvirt-admin-4.5.0-36.amzn2.3.4.aarch64
libvirt-bash-completion-4.5.0-36.amzn2.3.4.aarch64
libvirt-login-shell-4.5.0-36.amzn2.3.4.aarch64
libvirt-devel-4.5.0-36.amzn2.3.4.aarch64
libvirt-lock-sanlock-4.5.0-36.amzn2.3.4.aarch64
libvirt-nss-4.5.0-36.amzn2.3.4.aarch64
libvirt-debuginfo-4.5.0-36.amzn2.3.4.aarch64
i686:
libvirt-4.5.0-36.amzn2.3.4.i686
libvirt-docs-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-config-network-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.4.i686
libvirt-daemon-lxc-4.5.0-36.amzn2.3.4.i686
libvirt-client-4.5.0-36.amzn2.3.4.i686
libvirt-libs-4.5.0-36.amzn2.3.4.i686
libvirt-admin-4.5.0-36.amzn2.3.4.i686
libvirt-bash-completion-4.5.0-36.amzn2.3.4.i686
libvirt-login-shell-4.5.0-36.amzn2.3.4.i686
libvirt-devel-4.5.0-36.amzn2.3.4.i686
libvirt-nss-4.5.0-36.amzn2.3.4.i686
libvirt-debuginfo-4.5.0-36.amzn2.3.4.i686
src:
libvirt-4.5.0-36.amzn2.3.4.src
x86_64:
libvirt-4.5.0-36.amzn2.3.4.x86_64
libvirt-docs-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-config-network-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-gluster-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-rbd-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-qemu-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-kvm-4.5.0-36.amzn2.3.4.x86_64
libvirt-daemon-lxc-4.5.0-36.amzn2.3.4.x86_64
libvirt-client-4.5.0-36.amzn2.3.4.x86_64
libvirt-libs-4.5.0-36.amzn2.3.4.x86_64
libvirt-admin-4.5.0-36.amzn2.3.4.x86_64
libvirt-bash-completion-4.5.0-36.amzn2.3.4.x86_64
libvirt-login-shell-4.5.0-36.amzn2.3.4.x86_64
libvirt-devel-4.5.0-36.amzn2.3.4.x86_64
libvirt-lock-sanlock-4.5.0-36.amzn2.3.4.x86_64
libvirt-nss-4.5.0-36.amzn2.3.4.x86_64
libvirt-debuginfo-4.5.0-36.amzn2.3.4.x86_64