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Vulnerability of Linux kernel: use after free via drivers/media/usb/dvb-usb/dvb-usb-init.c

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via drivers/media/usb/dvb-usb/dvb-usb-init.c of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this threat: 2/4.
Creation date: 21/08/2019.
Références of this weakness: CERTFR-2019-AVI-639, CERTFR-2019-AVI-652, CERTFR-2019-AVI-655, CERTFR-2020-AVI-029, CVE-2019-15213, openSUSE-SU-2019:2675-1, SUSE-SU-2019:3316-1, SUSE-SU-2019:3372-1, SUSE-SU-2019:3379-1, SUSE-SU-2019:3381-1, SUSE-SU-2019:3389-1, SUSE-SU-2020:0093-1, VIGILANCE-VUL-30104.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via drivers/media/usb/dvb-usb/dvb-usb-init.c of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This computer vulnerability impacts software or systems such as Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this weakness bulletin 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 weakness.

Solutions for this threat 

Linux kernel: version 5.2.3.
The version 5.2.3 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.1.20.
The version 5.1.20 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.61.
The version 4.19.61 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for drivers/media/usb/dvb-usb/dvb-usb-init.c.
A patch is indicated in information sources.

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.36.1

SUSE LE 12 SP3: new kernel packages (23/12/2019).
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.113.1

SUSE LE 12 SP4: new kernel-azure packages (18/12/2019).
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.34.1

SUSE LE 12 SP5: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.7.1

SUSE LE 12 SP5: new kernel packages (30/12/2019).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.12.1

SUSE LE 15 RTM: new kernel packages (23/12/2019).
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.47.1

SUSE LE 15 SP1: new kernel-azure packages (20/12/2019).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.22.1

Wind River Linux: version 10.18.44.11.
The version 10.18.44.11 is fixed:
  https://support2.windriver.com/
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