Update04/13/2026

USN-8161-1: QEMU vulnerabilities

Ubuntu Desktop
Canonical

USN-8161-1: QEMU vulnerabilities

Publication date: April 2026
Overview: Several security issues were fixed in QEMU.

Packages
qemu - Machine emulator and virtualizer

Details
It was discovered that the LSI53C895A SCSI Host Bus Adapter implementation
of QEMU incorrectly handled memory. An attacker inside the guest could
possibly use this issue to cause QEMU to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2024-6519)

It was discovered that QEMU could be made to read out of bounds when
reading VMDK images. If a user or an automated system were tricked into
opening a specially crafted VMDK image, an attacker could possibly use
this issue to leak sensitive informaton or cause QEMU to crash, resulting
in a denial of service. (CVE-2026-2243)

It was discovered that the virtio-snd device implementation of QEMU could
be made to write out of bounds. An attacker inside the guest could
possibly use this issue to cause QEMU to crash, resulting in a denial of
service, or possibly execute arbitrary code. This issue only affected
Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-3195)

It was discovered that the virtio-snd device implementation of QEMU
contained an arithmetic overflow. An attacker inside the guest could
possibly use this issue to cause QEMU to crash, resulting in a denial of
service, or possibly execute arbitrary code. This issue only affected
Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-3196)

It was discovered that the Hyper-V Synthetic Debugging device
implementation of QEMU could me made to write out of bounds. An attacker
inside the guest could possibly use this issue to cause QEMU to crash,
resulting in a denial of service, or possibly execute arbitrary code. This
issue only affected Ubuntu 24.04 LTS and Ubuntu 25.10. (CVE-2026-3842)

Update instructions

After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes.

The problem can be corrected by updating your system to the following package versions:

25.10 questing

qemu-system – 1:10.1.0+ds-5ubuntu2.6
qemu-system-arm – 1:10.1.0+ds-5ubuntu2.6
qemu-system-common – 1:10.1.0+ds-5ubuntu2.6
qemu-system-data – 1:10.1.0+ds-5ubuntu2.6
qemu-system-gui – 1:10.1.0+ds-5ubuntu2.6
qemu-system-mips – 1:10.1.0+ds-5ubuntu2.6
qemu-system-misc – 1:10.1.0+ds-5ubuntu2.6
qemu-system-modules-opengl – 1:10.1.0+ds-5ubuntu2.6
qemu-system-modules-spice – 1:10.1.0+ds-5ubuntu2.6
qemu-system-ppc – 1:10.1.0+ds-5ubuntu2.6
qemu-system-riscv – 1:10.1.0+ds-5ubuntu2.6
qemu-system-s390x – 1:10.1.0+ds-5ubuntu2.6
qemu-system-sparc – 1:10.1.0+ds-5ubuntu2.6
qemu-system-x86 – 1:10.1.0+ds-5ubuntu2.6
qemu-system-x86-xen – 1:10.1.0+ds-5ubuntu2.6
qemu-system-xen – 1:10.1.0+ds-5ubuntu2.6

24.04 LTS noble

qemu-system – 1:8.2.2+ds-0ubuntu1.16
qemu-system-arm – 1:8.2.2+ds-0ubuntu1.16
qemu-system-common – 1:8.2.2+ds-0ubuntu1.16
qemu-system-data – 1:8.2.2+ds-0ubuntu1.16
qemu-system-gui – 1:8.2.2+ds-0ubuntu1.16
qemu-system-mips – 1:8.2.2+ds-0ubuntu1.16
qemu-system-misc – 1:8.2.2+ds-0ubuntu1.16
qemu-system-modules-opengl – 1:8.2.2+ds-0ubuntu1.16
qemu-system-modules-spice – 1:8.2.2+ds-0ubuntu1.16
qemu-system-ppc – 1:8.2.2+ds-0ubuntu1.16
qemu-system-s390x – 1:8.2.2+ds-0ubuntu1.16
qemu-system-sparc – 1:8.2.2+ds-0ubuntu1.16
qemu-system-x86 – 1:8.2.2+ds-0ubuntu1.16
qemu-system-x86-xen – 1:8.2.2+ds-0ubuntu1.16
qemu-system-xen – 1:8.2.2+ds-0ubuntu1.16

22.04 LTS jammy

qemu – 1:6.2+dfsg-2ubuntu6.30
qemu-system – 1:6.2+dfsg-2ubuntu6.30
qemu-system-arm – 1:6.2+dfsg-2ubuntu6.30
qemu-system-common – 1:6.2+dfsg-2ubuntu6.30
qemu-system-data – 1:6.2+dfsg-2ubuntu6.30
qemu-system-gui – 1:6.2+dfsg-2ubuntu6.30
qemu-system-mips – 1:6.2+dfsg-2ubuntu6.30
qemu-system-misc – 1:6.2+dfsg-2ubuntu6.30
qemu-system-ppc – 1:6.2+dfsg-2ubuntu6.30
qemu-system-s390x – 1:6.2+dfsg-2ubuntu6.30
qemu-system-sparc – 1:6.2+dfsg-2ubuntu6.30
qemu-system-x86 – 1:6.2+dfsg-2ubuntu6.30
qemu-system-x86-microvm – 1:6.2+dfsg-2ubuntu6.30
qemu-system-x86-xen – 1:6.2+dfsg-2ubuntu6.30