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Vulnerability of Linux kernel: NULL pointer dereference via relay_open

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via relay_open() of the Linux kernel, in order to trigger a denial of service.
Impacted software: Debian, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 02/12/2019.
Références of this announce: CERTFR-2020-AVI-368, CERTFR-2020-AVI-376, CERTFR-2020-AVI-421, CERTFR-2020-AVI-460, CERTFR-2020-AVI-462, CERTFR-2020-AVI-466, CVE-2019-19462, DLA-2242-1, DSA-4698-1, DSA-4699-1, openSUSE-SU-2020:0801-1, openSUSE-SU-2020:0935-1, SUSE-SU-2020:1599-1, SUSE-SU-2020:1663-1, SUSE-SU-2020:2027-1, SUSE-SU-2020:2105-1, SUSE-SU-2020:2156-1, USN-4414-1, USN-4425-1, USN-4439-1, USN-4440-1, VIGILANCE-VUL-31036.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via relay_open() of the Linux kernel, in order to trigger a denial of service.
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This weakness 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 vulnerability announce 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 threat bulletin.

Solutions for this threat 

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

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.118-2+deb10u1

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.210-1+deb9u1~deb8u1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.210-1+deb9u1

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

openSUSE Leap 15.2: new kernel packages.
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.20.7.1

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 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 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 18.0: new linux-image-5.0.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.0 5.0.0.1045.30

Ubuntu 18.0: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gcp 5.3.0.1032.26

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.107.112
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.109.97

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.4.0.42.46~18.04.35
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.30.37

Wind River Linux: version 10.17.41.22.
The version 10.17.41.22 is fixed:
  https://support2.windriver.com/
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