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Vulnerability of Linux kernel: memory leak via usbtest_disconnect

Synthesis of the vulnerability 

An attacker can create a memory leak via usbtest_disconnect() of the Linux kernel, in order to trigger a denial of service.
Vulnerable systems: Debian, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 1/4.
Creation date: 30/06/2020.
Références of this weakness: CERTFR-2020-AVI-462, CERTFR-2020-AVI-483, CERTFR-2020-AVI-504, CERTFR-2020-AVI-513, CERTFR-2020-AVI-522, CERTFR-2020-AVI-541, CERTFR-2020-AVI-547, CVE-2020-15393, DLA-2323-1, DLA-2324-1, openSUSE-SU-2020:1062-1, openSUSE-SU-2020:1153-1, 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-2020:2478-1, SUSE-SU-2020:2487-1, USN-4463-1, USN-4465-1, USN-4483-1, USN-4485-1, VIGILANCE-VUL-32648.

Description of the vulnerability 

An attacker can create a memory leak via usbtest_disconnect() of the Linux kernel, in order to trigger a denial of service.
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This vulnerability alert impacts software or systems such as Debian, Linux, openSUSE Leap, 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 5.7.8.
The version 5.7.8 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.51.
The version 5.4.51 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.132.
The version 4.19.132 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.188.
The version 4.14.188 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.230.
The version 4.9.230 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.230.
The version 4.4.230 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Debian 9: new linux-4.19 packages.
New packages are available:
  Debian 9: linux-4.19 4.19.132-1~deb9u1

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-lp152.33.1

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 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 14/16: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.187.164
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.187.193

Ubuntu 18.04: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.3 5.3.0.1033.18

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1093.70
  Ubuntu 16.04 LTS: linux-image-gcp 4.15.0.1081.83
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.115.103

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gcp 5.4.0.1022.9
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.45.49
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