Amazon Linux 2 (EOS) Security Advisory: ALAS2-2026-3932
Advisory Released Date: 2026-09-28
Advisory Updated Date: 2026-09-28
Severity:
Important
Issue Overview:
A symlink-following flaw was found in libvirt's qemuTPMEmulatorPrepareHost() function. The function uses a path-based chown() on the swtpm logfile without checking for symbolic links. A local attacker with access to the swtpm account can replace the logfile with a symlink, causing libvirtd (running as root) to transfer ownership of an arbitrary file to the swtpm user. (CVE-2026-77159)
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 ALAS2-2026-3932 to update your system.
New Packages:
aarch64:
libvirt-4.5.0-36.amzn2.3.5.aarch64
libvirt-docs-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-config-network-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-qemu-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-kvm-4.5.0-36.amzn2.3.5.aarch64
libvirt-daemon-lxc-4.5.0-36.amzn2.3.5.aarch64
libvirt-client-4.5.0-36.amzn2.3.5.aarch64
libvirt-libs-4.5.0-36.amzn2.3.5.aarch64
libvirt-admin-4.5.0-36.amzn2.3.5.aarch64
libvirt-bash-completion-4.5.0-36.amzn2.3.5.aarch64
libvirt-login-shell-4.5.0-36.amzn2.3.5.aarch64
libvirt-devel-4.5.0-36.amzn2.3.5.aarch64
libvirt-lock-sanlock-4.5.0-36.amzn2.3.5.aarch64
libvirt-nss-4.5.0-36.amzn2.3.5.aarch64
libvirt-debuginfo-4.5.0-36.amzn2.3.5.aarch64
i686:
libvirt-4.5.0-36.amzn2.3.5.i686
libvirt-docs-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-config-network-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.5.i686
libvirt-daemon-lxc-4.5.0-36.amzn2.3.5.i686
libvirt-client-4.5.0-36.amzn2.3.5.i686
libvirt-libs-4.5.0-36.amzn2.3.5.i686
libvirt-admin-4.5.0-36.amzn2.3.5.i686
libvirt-bash-completion-4.5.0-36.amzn2.3.5.i686
libvirt-login-shell-4.5.0-36.amzn2.3.5.i686
libvirt-devel-4.5.0-36.amzn2.3.5.i686
libvirt-nss-4.5.0-36.amzn2.3.5.i686
libvirt-debuginfo-4.5.0-36.amzn2.3.5.i686
src:
libvirt-4.5.0-36.amzn2.3.5.src
x86_64:
libvirt-4.5.0-36.amzn2.3.5.x86_64
libvirt-docs-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-config-network-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-config-nwfilter-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-network-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-nwfilter-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-nodedev-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-interface-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-secret-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-core-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-logical-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-disk-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-scsi-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-iscsi-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-mpath-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-gluster-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-rbd-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-storage-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-qemu-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-driver-lxc-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-kvm-4.5.0-36.amzn2.3.5.x86_64
libvirt-daemon-lxc-4.5.0-36.amzn2.3.5.x86_64
libvirt-client-4.5.0-36.amzn2.3.5.x86_64
libvirt-libs-4.5.0-36.amzn2.3.5.x86_64
libvirt-admin-4.5.0-36.amzn2.3.5.x86_64
libvirt-bash-completion-4.5.0-36.amzn2.3.5.x86_64
libvirt-login-shell-4.5.0-36.amzn2.3.5.x86_64
libvirt-devel-4.5.0-36.amzn2.3.5.x86_64
libvirt-lock-sanlock-4.5.0-36.amzn2.3.5.x86_64
libvirt-nss-4.5.0-36.amzn2.3.5.x86_64
libvirt-debuginfo-4.5.0-36.amzn2.3.5.x86_64