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Ubuntu 25.10 QEMU Critical Denial of Service Exec USN-8161-1

ubuntu
Calendar Grey April 10, 2026
Dist Ubuntu Esm H88
Several issues fixed in QEMU across Ubuntu versions; critical updates advised for denial of service and code execution.
Several security issues were fixed in QEMU.

Summary

Several security issues were fixed in QEMU.

Software Description:

- 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...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu update instructions QEMU

Update Instructions

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

Ubuntu 25.10
  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

Ubuntu 24.04 LTS
  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

Ubuntu 22.04 LTS
  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

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

References

https://ubuntu.com/security/notices/USN-8161-1

CVE-2024-6519, CVE-2026-2243, CVE-2026-3195, CVE-2026-3196,

CVE-2026-3842

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8161-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu update instructions QEMU

Package Information

https://launchpad.net/ubuntu/+source/qemu/1:10.1.0+ds-5ubuntu2.6
https://launchpad.net/ubuntu/+source/qemu/1:8.2.2+ds-0ubuntu1.16
https://launchpad.net/ubuntu/+source/qemu/1:6.2+dfsg-2ubuntu6.30

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