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Ubuntu QEMU Medium Regression Denial of Service Fix USN-8412-3

ubuntu
Calendar Grey June 29, 2026
Dist Ubuntu Esm H88
Fix for QEMU regression affecting Ubuntu 20.04 LTS with potential denial of service is detailed within this advisory.
USN-8412-1 introduced a regression in QEMU

Summary

USN-8412-1 introduced a regression in QEMU

Software Description:

- qemu: Machine emulator and virtualizer

Details:

USN-8412-1 fixed vulnerabilities QEMU. On Ubuntu 20.04 LTS, the fix for

CVE-2024-4467 was incomplete and prevented the creation of boot volumes

from qcow2 images. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Felipe Franciosi, Raphael Norwitz, and Peter Turschmid discovered that the

iSCSI block driver in QEMU incorrectly handled certain responses from an

iSCSI server. A remote attacker 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 14.04 LTS. (CVE-2020-1711)

It was discovered that the iSCSI block driver in QEMU incorrectly handled

certain memory operations, leading to a heap-based buffer over-read. An

attacker could possibly use this issue to expose sensitive information

from the host. This issue on...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu medium regression QEMU

Update Instructions

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

Ubuntu 20.04 LTS
  qemu                            1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-block-extra                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-guest-agent                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-kvm                        1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system                     1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-arm                 1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-common              1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-data                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-gui                 1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-mips                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-misc                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-ppc                 1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-s390x               1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-sparc               1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-x86                 1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-x86-microvm         1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-system-x86-xen             1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-user                       1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-user-binfmt                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-user-static                1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro
  qemu-utils                      1:4.2-3ubuntu6.30+esm3
                                  Available with Ubuntu Pro

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-8412-3

https://ubuntu.com/security/notices/USN-8412-2

https://ubuntu.com/security/notices/USN-8412-1

https://launchpad.net/bugs/2158180

Severity
medium
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-8412-3

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu medium regression QEMU

Package Information

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