Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-242
Advisory Released Date: 2026-10-21
Advisory Updated Date: 2026-11-02
Severity:
Important
Issue Overview:
Package updates are available for Amazon Linux 2027 that fix the following vulnerabilities:
CVE-2026-18917:
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.
Affected Packages:
libvirt
Issue Correction:
Run dnf update libvirt --releasever 2027.0.20261021 or dnf update --advisory ALAS2027-2026-242 --releasever 2027.0.20261021 to update your system.
New Packages:
aarch64:
libvirt-devel-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-core-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-disk-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-client-qemu-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-plugin-lockd-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-network-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-qemu-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-nwfilter-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-ssh-proxy-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-log-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-libs-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-interface-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-secret-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-12.0.0-3.amzn2027.0.4.aarch64
libvirt-libs-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-lock-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-qemu-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-nss-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-client-12.0.0-3.amzn2027.0.4.aarch64
libvirt-nss-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-proxy-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-plugin-lockd-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-core-12.0.0-3.amzn2027.0.4.aarch64
libvirt-ssh-proxy-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-log-12.0.0-3.amzn2027.0.4.aarch64
libvirt-debugsource-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-secret-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-common-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-config-nwfilter-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-config-network-12.0.0-3.amzn2027.0.4.aarch64
libvirt-docs-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-logical-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-nodedev-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-nodedev-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-kvm-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-common-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-client-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-disk-12.0.0-3.amzn2027.0.4.aarch64
libvirt-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-storage-logical-debuginfo-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-lock-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-nwfilter-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-network-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-proxy-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-interface-12.0.0-3.amzn2027.0.4.aarch64
libvirt-daemon-driver-qemu-12.0.0-3.amzn2027.0.4.aarch64
src:
libvirt-12.0.0-3.amzn2027.0.4.src
x86_64:
libvirt-daemon-driver-secret-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-config-nwfilter-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-docs-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-lock-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-ssh-proxy-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-kvm-12.0.0-3.amzn2027.0.4.x86_64
libvirt-libs-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-nss-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-debugsource-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-common-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-core-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-interface-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-ssh-proxy-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-disk-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-config-network-12.0.0-3.amzn2027.0.4.x86_64
libvirt-client-qemu-12.0.0-3.amzn2027.0.4.x86_64
libvirt-nss-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-log-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-lock-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-logical-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-proxy-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-libs-12.0.0-3.amzn2027.0.4.x86_64
libvirt-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-plugin-lockd-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-nodedev-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-nodedev-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-nwfilter-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-client-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-common-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-disk-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-qemu-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-network-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-qemu-debuginfo-12.0.0-3.amzn2027.0.4.x86_64
libvirt-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-plugin-lockd-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-qemu-12.0.0-3.amzn2027.0.4.x86_64
libvirt-devel-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-logical-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-log-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-network-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-storage-core-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-nwfilter-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-secret-12.0.0-3.amzn2027.0.4.x86_64
libvirt-client-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-driver-interface-12.0.0-3.amzn2027.0.4.x86_64
libvirt-daemon-proxy-12.0.0-3.amzn2027.0.4.x86_64