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Vulnerability of QEMU: integer overflow via sm501_2d_operation

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger an integer overflow via sm501_2d_operation() of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
Impacted systems: Debian, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 20/08/2020.
Références of this alert: CVE-2020-12829, DSA-4760-1, openSUSE-SU-2021:0600-1, SUSE-SU-2021:1240-1, SUSE-SU-2021:1241-1, SUSE-SU-2021:1242-1, SUSE-SU-2021:1243-1, SUSE-SU-2021:1244-1, SUSE-SU-2021:1245-1, SUSE-SU-2021:1305-1, SUSE-SU-2021:14704-1, SUSE-SU-2021:14706-1, USN-4467-1, USN-4467-3, VIGILANCE-VUL-33119.

Description of the vulnerability 

An attacker, inside a guest system, can trigger an integer overflow via sm501_2d_operation() of QEMU, in order to trigger a denial of service, and possibly to run code on the host system.
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This computer vulnerability note impacts software or systems such as Debian, openSUSE Leap, QEMU, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability announce is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this cybersecurity announce.

Solutions for this threat 

QEMU: patch for sm501_2d_operation.
A patch is indicated in information sources.

Debian 10: new qemu packages.
New packages are available:
  Debian 10: qemu 1:3.1+dfsg-8+deb10u8

openSUSE Leap 15.2: new qemu packages.
New packages are available:
  openSUSE Leap 15.2: qemu 4.2.1-lp152.9.12.1

SUSE LE 11 SP3: new kvm packages.
New packages are available:
  SUSE LE 11 SP3: kvm 1.4.2-53.38.1

SUSE LE 11 SP4: new kvm packages.
New packages are available:
  SUSE LE 11 SP4: kvm 1.4.2-60.34.1

SUSE LE 12 SP2: new qemu packages.
New packages are available:
  SUSE LE 12 SP2: qemu 2.6.2-41.62.1

SUSE LE 12 SP3: new qemu packages.
New packages are available:
  SUSE LE 12 SP3: qemu 2.9.1-6.47.1

SUSE LE 12 SP4: new qemu packages.
New packages are available:
  SUSE LE 12 SP4: qemu 2.11.2-5.29.1

SUSE LE 12 SP5: new qemu packages.
New packages are available:
  SUSE LE 12 SP5: qemu 3.1.1.1-48.2

SUSE LE 15 RTM: new qemu packages.
New packages are available:
  SUSE LE 15 RTM: qemu 2.11.2-9.43.1

SUSE LE 15 SP1: new qemu packages.
New packages are available:
  SUSE LE 15 SP1: qemu 3.1.1.1-9.24.3

SUSE LE 15 SP2: new qemu packages.
New packages are available:
  SUSE LE 15 SP2: qemu 4.2.1-11.16.3

Ubuntu: new qemu packages.
New packages are available:
  Ubuntu 20.10: qemu 1:5.0-5ubuntu9.6
  Ubuntu 20.04 LTS: qemu 1:4.2-3ubuntu6.14
  Ubuntu 18.04 LTS: qemu 1:2.11+dfsg-1ubuntu7.36
  Ubuntu 16.04 LTS: qemu 1:2.5+dfsg-5ubuntu10.51
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