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Vulnerability of Linux kernel: NULL pointer dereference via dlpar_parse_cc_property

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via dlpar_parse_cc_property() of the Linux kernel, in order to trigger a denial of service.
Vulnerable systems: Fedora, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 1/4.
Creation date: 04/06/2019.
Références of this weakness: CERTFR-2019-AVI-306, CERTFR-2019-AVI-330, CERTFR-2019-AVI-337, CERTFR-2019-AVI-346, CERTFR-2019-AVI-354, CERTFR-2019-AVI-391, CERTFR-2019-AVI-458, CERTFR-2020-AVI-281, CVE-2019-12614, FEDORA-2019-83858fc57b, FEDORA-2019-c03eda3cc6, openSUSE-SU-2019:1716-1, openSUSE-SU-2019:1757-1, RHSA-2020:2104-01, SSA:2020-008-01, SUSE-SU-2019:14127-1, SUSE-SU-2019:1744-1, SUSE-SU-2019:1823-1, SUSE-SU-2019:1823-2, SUSE-SU-2019:1851-1, SUSE-SU-2019:1852-1, SUSE-SU-2019:1855-1, SUSE-SU-2019:1870-1, SUSE-SU-2019:2430-1, SUSE-SU-2019:2450-1, USN-4093-1, USN-4094-1, USN-4095-1, USN-4095-2, VIGILANCE-VUL-29456.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via dlpar_parse_cc_property() of the Linux kernel, in order to trigger a denial of service.
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This cybersecurity vulnerability impacts software or systems such as Fedora, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: version 4.19.88.
The version 4.19.88 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.158.
The version 4.14.158 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.206.
The version 4.9.206 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.206.
The version 4.4.206 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Fedora: new kernel-headers packages.
New packages are available:
  Fedora 29: kernel-headers 5.1.8-200.fc29
  Fedora 30: kernel-headers 5.1.8-300.fc30

Fedora: new kernel packages.
New packages are available:
  Fedora 29: kernel 5.1.8-200.fc29
  Fedora 30: kernel 5.1.8-300.fc30

openSUSE Leap 15.0: new kernel packages.
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.67.1

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel debug-4.12.14-lp151.28.10.1

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-alt 4.14.0-115.21.2.el7a

Slackware 14.2: new kernel packages (09/01/2020).
New packages are available:
  Slackware 14.2: kernel 4.4.208-*-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.98.1

SUSE LE 12 SP1: new kernel packages.
New packages are available:
  SUSE LE 12 SP1: kernel 3.12.74-60.64.118.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.117.1

SUSE LE 12 SP3: new kernel packages.
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.100.1

SUSE LE 12 SP4: new kernel packages (16/07/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.24.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.3.1

SUSE LE 15 RTM: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.27.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.7.1

SUSE LE 15 SP1: new kernel-source-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-source-rt 4.12.14-14.8.1

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.58.79
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.58.60

Ubuntu: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.159.140
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.159.167

Ubuntu: new linux-image-5.0.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.0.0.25.82
  Ubuntu 19.04: linux-image-generic 5.0.0.25.26
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