Amazon Linux 2 Security Advisory: ALAS2-2026-3793
Advisory Released Date: 2026-07-08
Advisory Updated Date: 2026-07-08
Severity:
Medium
Issue Overview:
A flaw was found in QEMU's virtio-blk device. The issue arises because the device does not properly validate the size of input descriptors before writing data. A malicious guest with high privileges could exploit this vulnerability by submitting a malformed virtio-blk SCSI request, leading to an out-of-bounds write in the host heap memory and a potential denial of service (DoS) for the QEMU process. (CVE-2026-48914)
Affected Packages:
qemu
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 qemu or yum update --advisory ALAS2-2026-3793 to update your system.
New Packages:
aarch64:
qemu-3.1.0-8.amzn2.0.25.aarch64
qemu-common-3.1.0-8.amzn2.0.25.aarch64
qemu-guest-agent-3.1.0-8.amzn2.0.25.aarch64
qemu-img-3.1.0-8.amzn2.0.25.aarch64
ivshmem-tools-3.1.0-8.amzn2.0.25.aarch64
qemu-block-curl-3.1.0-8.amzn2.0.25.aarch64
qemu-block-dmg-3.1.0-8.amzn2.0.25.aarch64
qemu-block-iscsi-3.1.0-8.amzn2.0.25.aarch64
qemu-block-nfs-3.1.0-8.amzn2.0.25.aarch64
qemu-block-rbd-3.1.0-8.amzn2.0.25.aarch64
qemu-block-ssh-3.1.0-8.amzn2.0.25.aarch64
qemu-audio-alsa-3.1.0-8.amzn2.0.25.aarch64
qemu-audio-oss-3.1.0-8.amzn2.0.25.aarch64
qemu-audio-pa-3.1.0-8.amzn2.0.25.aarch64
qemu-audio-sdl-3.1.0-8.amzn2.0.25.aarch64
qemu-ui-curses-3.1.0-8.amzn2.0.25.aarch64
qemu-ui-gtk-3.1.0-8.amzn2.0.25.aarch64
qemu-ui-sdl-3.1.0-8.amzn2.0.25.aarch64
qemu-kvm-3.1.0-8.amzn2.0.25.aarch64
qemu-kvm-core-3.1.0-8.amzn2.0.25.aarch64
qemu-user-3.1.0-8.amzn2.0.25.aarch64
qemu-user-binfmt-3.1.0-8.amzn2.0.25.aarch64
qemu-user-static-3.1.0-8.amzn2.0.25.aarch64
qemu-system-aarch64-3.1.0-8.amzn2.0.25.aarch64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.25.aarch64
qemu-system-x86-3.1.0-8.amzn2.0.25.aarch64
qemu-system-x86-core-3.1.0-8.amzn2.0.25.aarch64
qemu-debuginfo-3.1.0-8.amzn2.0.25.aarch64
src:
qemu-3.1.0-8.amzn2.0.25.src
x86_64:
qemu-3.1.0-8.amzn2.0.25.x86_64
qemu-common-3.1.0-8.amzn2.0.25.x86_64
qemu-guest-agent-3.1.0-8.amzn2.0.25.x86_64
qemu-img-3.1.0-8.amzn2.0.25.x86_64
ivshmem-tools-3.1.0-8.amzn2.0.25.x86_64
qemu-block-curl-3.1.0-8.amzn2.0.25.x86_64
qemu-block-dmg-3.1.0-8.amzn2.0.25.x86_64
qemu-block-iscsi-3.1.0-8.amzn2.0.25.x86_64
qemu-block-nfs-3.1.0-8.amzn2.0.25.x86_64
qemu-block-rbd-3.1.0-8.amzn2.0.25.x86_64
qemu-block-ssh-3.1.0-8.amzn2.0.25.x86_64
qemu-audio-alsa-3.1.0-8.amzn2.0.25.x86_64
qemu-audio-oss-3.1.0-8.amzn2.0.25.x86_64
qemu-audio-pa-3.1.0-8.amzn2.0.25.x86_64
qemu-audio-sdl-3.1.0-8.amzn2.0.25.x86_64
qemu-ui-curses-3.1.0-8.amzn2.0.25.x86_64
qemu-ui-gtk-3.1.0-8.amzn2.0.25.x86_64
qemu-ui-sdl-3.1.0-8.amzn2.0.25.x86_64
qemu-kvm-3.1.0-8.amzn2.0.25.x86_64
qemu-kvm-core-3.1.0-8.amzn2.0.25.x86_64
qemu-user-3.1.0-8.amzn2.0.25.x86_64
qemu-user-binfmt-3.1.0-8.amzn2.0.25.x86_64
qemu-user-static-3.1.0-8.amzn2.0.25.x86_64
qemu-system-aarch64-3.1.0-8.amzn2.0.25.x86_64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.25.x86_64
qemu-system-x86-3.1.0-8.amzn2.0.25.x86_64
qemu-system-x86-core-3.1.0-8.amzn2.0.25.x86_64
qemu-debuginfo-3.1.0-8.amzn2.0.25.x86_64