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Vulnerability of Linux kernel: denial of service via the VFIO device driver

Synthesis of the vulnerability 

An attacker, inside a guest system, can trigger a fatal error via VFIO of the Linux kernel, in order to trigger a denial of service on the host system.
Impacted products: Fedora, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 19/05/2020.
Références of this threat: CERTFR-2020-AVI-388, CERTFR-2020-AVI-415, CERTFR-2020-AVI-459, CERTFR-2020-AVI-462, CERTFR-2020-AVI-474, CERTFR-2020-AVI-483, CERTFR-2020-AVI-547, CERTFR-2020-AVI-585, CVE-2020-12888, FEDORA-2020-5436586091, FEDORA-2020-57bf620276, openSUSE-SU-2020:0935-1, openSUSE-SU-2020:1153-1, RHSA-2020:2664-01, RHSA-2020:2665-01, RHSA-2020:2831-01, RHSA-2020:2832-01, RHSA-2020:2851-01, RHSA-2020:2854-01, RHSA-2020:3010-01, RHSA-2020:3016-01, RHSA-2020:3019-01, RHSA-2020:3041-01, RHSA-2020:3222-01, RHSA-2020:3230-01, SUSE-SU-2020:2027-1, SUSE-SU-2020:2103-1, SUSE-SU-2020:2105-1, SUSE-SU-2020:2106-1, SUSE-SU-2020:2107-1, SUSE-SU-2020:2119-1, SUSE-SU-2020:2121-1, SUSE-SU-2020:2122-1, SUSE-SU-2020:2156-1, SUSE-SU-2020:2478-1, SUSE-SU-2020:2487-1, USN-4525-1, USN-4526-1, VIGILANCE-VUL-32301.

Description of the vulnerability 

An attacker, inside a guest system, can trigger a fatal error via VFIO of the Linux kernel, in order to trigger a denial of service on the host system.
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This computer threat announce impacts software or systems such as Fedora, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability 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 alert.

Solutions for this threat 

Linux kernel: version 5.4.64.
The version 5.4.64 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.144.
The version 4.19.144 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.236.
The version 4.9.236 is fixed:
  http://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for VIFO.
A patch is indicated in information sources.

Fedora 31-32: new kernel packages.
New packages are available:
  Fedora 31: kernel 5.6.15-200.fc31
  Fedora 32: kernel 5.6.14-300.fc32

openSUSE Leap 15.1: new kernel packages (07/08/2020).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.59.1

openSUSE Leap 15.2: new kernel packages.
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.20.7.1

RHEL 7.2: new kernel packages.
New packages are available:
  RHEL 7.2: kernel 3.10.0-327.89.1.el7

RHEL 7.3: new kernel packages.
New packages are available:
  RHEL 7.3: kernel 3.10.0-514.78.1.el7

RHEL 7.4: new kernel packages.
New packages are available:
  RHEL 7.0-7.8: kernel 3.10.0-693.71.2.el7

RHEL 7.6: new kernel packages.
New packages are available:
  RHEL 7.6: kernel 3.10.0-957.56.1.el7

RHEL 7.7: new kernel packages.
New packages are available:
  RHEL 7.7: kernel 3.10.0-1062.30.1.el7

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-alt 4.14.0-115.26.1.el7a

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7.0-7.8: kernel 3.10.0-1127.13.1.el7

RHEL 7: new kernel-rt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-rt 3.10.0-1127.13.1.rt56.1110.el7

RHEL 8.0: new kernel packages.
New packages are available:
  RHEL 8.0: kernel 4.18.0-80.27.1.el8_0

RHEL 8.1: new kernel packages.
New packages are available:
  RHEL 8.1: kernel 4.18.0-147.24.2.el8_1

RHEL 8.2: new kernel packages.
New packages are available:
  RHEL 8.2: kernel 4.18.0-193.13.2.el8_2

RHEL 8.2: new kernel-rt packages.
New packages are available:
  RHEL 8.2: kernel-rt 4.18.0-193.13.2.rt13.65.el8_2

SUSE LE 12 SP4: new kernel packages.
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.57.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.23.1

SUSE LE 12 SP5: new kernel-azure packages (05/08/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.22.1

SUSE LE 12 SP5: new kernel packages (05/08/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.29.1

SUSE LE 12 SP5: new kernel-rt packages (03/09/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.13.1

SUSE LE 15 RTM: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.55.1

SUSE LE 15 SP1: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.38.1

SUSE LE 15 SP1: new kernel packages (04/08/2020).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.48.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.28.1

SUSE LE 15 SP2: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.5.1

SUSE LE 15 SP2: new kernel packages.
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.9.1

Ubuntu 20.04: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-5.4.0-48-generic 5.4.0-48.52

Ubuntu: new linux-image-4.15.0 packages (22/09/2020).
New packages are available:
  Ubuntu 18.04 LTS: linux-image-4.15.0-118-generic 4.15.0-118.119
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.118.119
  Ubuntu 14.04 ESM: linux-image-4.15.0-1096-azure 4.15.0-1096.106~14.04.1
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