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Vulnerability of Linux kernel: use after free

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Impacted software: Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 19/05/2020.
Références of this announce: CERTFR-2020-AVI-300, CERTFR-2020-AVI-307, CERTFR-2020-AVI-312, CERTFR-2020-AVI-326, CERTFR-2020-AVI-355, CERTFR-2020-AVI-376, CERTFR-2020-AVI-547, CVE-2020-12657, openSUSE-SU-2020:0801-1, RHSA-2020:2427-01, RHSA-2020:2428-01, RHSA-2020:2429-01, RHSA-2020:2567-01, RHSA-2020:2667-01, RHSA-2020:2669-01, SUSE-SU-2020:1599-1, SUSE-SU-2020:1663-1, SUSE-SU-2020:2156-1, SUSE-SU-2020:2478-1, SUSE-SU-2020:2487-1, USN-4363-1, USN-4367-1, USN-4367-2, USN-4368-1, USN-4369-1, USN-4369-2, VIGILANCE-VUL-32296.

Description of the vulnerability 

An attacker can force the usage of a freed memory area of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This vulnerability alert impacts software or systems such as Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer weakness alert is low.

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 computer vulnerability.

Solutions for this threat 

Linux kernel: version 5.6.5.
The version 5.6.5 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.52.1

RHEL 8.0: new kernel packages.
New packages are available:
  RHEL 8.0: kernel 4.18.0-80.23.2.el8_0

RHEL 8.1: new kernel packages.
New packages are available:
  RHEL 8.1: kernel 4.18.0-147.20.1.el8_1

RHEL 8.1: new kpatch-patch packages.
New packages are available:
  RHEL 8.0-8.1: kpatch-patch 4_18_0-147-1-14.el8

RHEL 8.2: new kernel packages.
New packages are available:
  RHEL 8.2: kernel 4.18.0-193.6.3.el8_2

RHEL 8.2: new kernel-rt packages.
New packages are available:
  RHEL 8.2: kernel-rt 4.18.0-193.6.3.rt13.59.el8_2

RHEL 8: new kpatch-patch packages.
New packages are available:
  RHEL 8.0-8.1: kpatch-patch 4_18_0-193-1-3.el8

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

SUSE LE 15: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.52.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.45.1

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

Ubuntu 18.04 LTS: new linux-image-5.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-5.0.0-1037-gke 5.0.0-1037.38, linux-image-5.0.0-1052-oem-osp1 5.0.0-1052.57, linux-image-gke-5.0 5.0.0.1037.25, linux-image-oem-osp1 5.0.0.1052.55

Ubuntu 20.04 LTS: new linux-image-5.4.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-4.15.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.3.0.53.109
  Ubuntu 19.10: linux-image-generic 5.3.0.53.45

Wind River Linux: version 10.18.44.17.
The version 10.18.44.17 is fixed:
  https://support2.windriver.com/
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