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Vulnerability of Linux kernel: use after free via blkdev_get

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via blkdev_get of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Android OS, Tivoli Storage Manager, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 07/12/2020.
Références of this computer vulnerability: 6445699, CERTFR-2020-AVI-794, CERTFR-2020-AVI-811, CERTFR-2020-AVI-837, CERTFR-2021-AVI-021, CERTFR-2021-AVI-078, CERTFR-2021-AVI-111, CERTFR-2021-AVI-120, CERTFR-2021-AVI-125, CERTFR-2021-AVI-149, CERTFR-2021-AVI-324, CVE-2020-15436, openSUSE-SU-2020:1153-1, openSUSE-SU-2020:2161-1, openSUSE-SU-2020:2193-1, openSUSE-SU-2020:2260-1, openSUSE-SU-2021:0242-1, RHSA-2021:0336-01, RHSA-2021:0338-01, RHSA-2021:0354-01, RHSA-2021:1376-01, SUSE-SU-2020:3713-1, SUSE-SU-2020:3717-1, SUSE-SU-2020:3718-1, SUSE-SU-2020:3748-1, SUSE-SU-2020:3764-1, SUSE-SU-2020:3766-1, SUSE-SU-2020:3798-1, SUSE-SU-2021:0097-1, SUSE-SU-2021:0098-1, SUSE-SU-2021:0434-1, SUSE-SU-2021:0437-1, SUSE-SU-2021:0438-1, SUSE-SU-2021:0452-1, SUSE-SU-2021:14630-1, USN-4752-1, VIGILANCE-VUL-34039.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via blkdev_get of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This computer threat bulletin impacts software or systems such as Android OS, Tivoli Storage Manager, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: version 5.7.6.
The version 5.7.6 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.49.
The version 5.4.49 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.130.
The version 4.19.130 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.186.
The version 4.14.186 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Google Android/Pixel: patch for April 2021.
A patch is indicated in information sources.

IBM Spectrum Protect Plus: solution for Linux.
The solution is indicated in information sources.

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 15.1: new kernel packages (07/12/2020).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.87.1

openSUSE Leap 15.2: new kernel packages (07/12/2020).
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.54.1

openSUSE Leap 15.2: new kernel packages (15/12/2020).
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.57.1.lp152.8.17.1

openSUSE Leap 15.2: new kernel-rt packages.
New packages are available:
  openSUSE Leap 15.2: kernel-rt 5.3.18-lp152.3.5.1

RHEL 7.6: new kernel packages.
New packages are available:
  RHEL 7.0-7.9: kernel 3.10.0-957.72.1.el7

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.9: kernel-alt 4.14.0-115.35.1.el7a

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7.0-7.9: kernel 3.10.0-1160.15.2.el7

RHEL 7: new kernel-rt packages.
New packages are available:
  RHEL 7.0-7.9: kernel-rt 3.10.0-1160.15.2.rt56.1152.el7

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.120.1

SUSE LE 12 SP2: new kernel packages (11/02/2021).
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.149.1

SUSE LE 12 SP3: new kernel packages (15/02/2021).
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.138.1

SUSE LE 12 SP4: new kernel packages.
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.68.1

SUSE LE 12 SP5: new kernel-azure packages (13/01/2021).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.41.1

SUSE LE 12 SP5: new kernel packages (09/12/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.54.1

SUSE LE 12 SP5: new kernel-rt packages (14/12/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.25.1

SUSE LE 15 RTM: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.66.1

SUSE LE 15 SP1: new kernel-azure packages (13/01/2021).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.58.1

SUSE LE 15 SP1: new kernel packages (09/12/2020).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.75.1

SUSE LE 15 SP1: new kernel-rt packages (15/12/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.44.2

SUSE LE 15 SP2: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.29.1

SUSE LE 15 SP2: new kernel packages (11/12/2020).
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.43.2

SUSE LE 15 SP2: new kernel-rt packages (14/12/2020).
New packages are available:
  SUSE LE 15 SP2: kernel-rt 5.3.18-19.1

Ubuntu 20.04: new linux-image-5.6.0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-oem-20.04 5.6.0.1048.44
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