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Vulnerability of Linux kernel: NULL pointer dereference via alloc_workqueue

Synthesis of the vulnerability

An attacker can force a NULL pointer to be dereferenced via alloc_workqueue of the Linux kernel, in order to trigger a denial of service.
Severity of this alert: 1/4.
Number of vulnerabilities in this bulletin: 6.
Creation date: 12/09/2019.
Références of this alert: CERTFR-2019-AVI-561, CERTFR-2019-AVI-575, CERTFR-2019-AVI-612, CERTFR-2019-AVI-635, CERTFR-2019-AVI-639, CERTFR-2019-AVI-652, CERTFR-2020-AVI-005, CERTFR-2020-AVI-013, CERTFR-2020-AVI-029, CVE-2019-16229, CVE-2019-16230, CVE-2019-16231, CVE-2019-16232, CVE-2019-16233, CVE-2019-16234, DSA-2019-189, FEDORA-2019-124a241044, FEDORA-2019-b86a7bdba0, openSUSE-SU-2019:2392-1, openSUSE-SU-2019:2444-1, openSUSE-SU-2019:2503-1, openSUSE-SU-2019:2507-1, SUSE-SU-2019:14218-1, SUSE-SU-2019:2879-1, SUSE-SU-2019:2946-1, SUSE-SU-2019:2947-1, SUSE-SU-2019:2948-1, SUSE-SU-2019:2949-1, SUSE-SU-2019:2950-1, SUSE-SU-2019:2951-1, SUSE-SU-2019:2952-1, SUSE-SU-2019:2953-1, SUSE-SU-2019:2984-1, SUSE-SU-2019:3200-1, SUSE-SU-2019:3289-1, SUSE-SU-2019:3294-1, SUSE-SU-2019:3295-1, SUSE-SU-2019:3316-1, SUSE-SU-2019:3317-1, SUSE-SU-2019:3371-1, SUSE-SU-2019:3372-1, SUSE-SU-2019:3379-1, SUSE-SU-2019:3381-1, SUSE-SU-2020:0093-1, USN-4225-1, USN-4225-2, USN-4226-1, USN-4227-1, USN-4227-2, VIGILANCE-VUL-30323.

Description of the vulnerability

An attacker can force a NULL pointer to be dereferenced via alloc_workqueue of the Linux kernel, in order to trigger a denial of service.
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This security note impacts software or systems such as Fedora, Linux, openSUSE Leap, RSA Authentication Manager, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this threat announce is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

This bulletin is about 6 vulnerabilities.

An attacker with a expert ability can exploit this computer weakness announce.

Solutions for this threat

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

Fedora 30: new kernel packages.
New packages are available:
  Fedora 30: kernel 5.3.14-200.fc30

Fedora 31: new kernel packages.
New packages are available:
  Fedora 31: kernel 5.3.14-300.fc31

openSUSE Leap 15.0: new kernel packages (14/11/2019).
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.82.1

openSUSE Leap 15.0: new kernel packages (28/10/2019).
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.79.1

openSUSE Leap 15.1: new kernel packages (06/11/2019).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.25.1

openSUSE Leap 15.1: new kernel packages (14/11/2019).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.32.1

RSA Authentication Manager: version 8.4 Patch 9.
The version 8.4 Patch 9 is fixed:
  https://www.dell.com/support/

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.108.1

SUSE LE 12 SP1: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP1: kernel 3.12.74-60.64.124.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.125.1

SUSE LE 12 SP3: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.107.1

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 (13/11/2019).
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.29.1

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 SP4: new kernel packages (04/11/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.37.1

SUSE LE 12 SP4: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.40.1

SUSE LE 12 SP4: new kernel packages (20/12/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.45.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.9.3

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 (09/12/2019).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.7.1

SUSE LE 15 RTM: new kernel-azure packages (13/11/2019).
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.44.1

SUSE LE 15 RTM: new kernel-azure packages (13/12/2019).
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.47.1

SUSE LE 15 RTM: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.41.1

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 (13/11/2019).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.19.1

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

SUSE LE 15 SP1: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.26.1

SUSE LE 15 SP1: new kernel packages (18/12/2019).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.29.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.14.3

Ubuntu: new linux-image-4.15.0 packages (07/01/2020).
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1066.52
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.74.94
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.74.76

Ubuntu: new linux-image-5.0.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-azure 5.0.0.1028.39
  Ubuntu 19.04: linux-image-generic 5.0.0.38.40

Ubuntu: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.3.0.26.95, linux-image-azure-edge 5.3.0.1009.9
  Ubuntu 19.10: linux-image-generic 5.3.0.26.30

Wind River Linux: version 10.18.44.14.
The version 10.18.44.14 is fixed:
  https://support2.windriver.com/
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