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Vulnerability of Linux kernel: memory leak via genl_register_family

Synthesis of the vulnerability 

An attacker can create a memory leak via genl_register_family() of the Linux kernel, in order to trigger a denial of service.
Impacted software: Linux, openSUSE Leap, SIMATIC, SUSE Linux Enterprise Desktop, SLES.
Severity of this computer vulnerability: 1/4.
Creation date: 25/09/2019.
Références of this announce: CERTFR-2019-AVI-455, CERTFR-2019-AVI-502, CERTFR-2019-AVI-503, CERTFR-2019-AVI-530, CVE-2019-15921, openSUSE-SU-2019:2173-1, openSUSE-SU-2019:2181-1, SSB-439005, SUSE-SU-2019:2412-1, SUSE-SU-2019:2424-1, SUSE-SU-2019:2648-1, SUSE-SU-2019:2651-1, SUSE-SU-2019:2658-1, SUSE-SU-2019:2738-1, VIGILANCE-VUL-30406.

Description of the vulnerability 

An attacker can create a memory leak via genl_register_family() of the Linux kernel, in order to trigger a denial of service.
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This computer weakness bulletin impacts software or systems such as Linux, openSUSE Leap, SIMATIC, SUSE Linux Enterprise Desktop, SLES.

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

Solutions for this threat 

Linux kernel: version 5.0.6.
The version 5.0.6 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.33.
The version 4.19.33 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.110.
The version 4.14.110 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

openSUSE Leap 15: new kernel packages.
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.73.1
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.16.1

SIMATIC S7-1500 CPU 1518: workaround for GNU/Linux Vulnerabilities.
A workaround is indicated in the information source.

SUSE LE 12 SP4: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.26.1

SUSE LE 12 SP4: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default 4.12.14-95.32.1

SUSE LE 15: new kernel-azure packages.
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.41.1
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.16.1

SUSE LE 15 SP1: new kernel-default packages.
New packages are available:
  SUSE LE 15 SP1: kernel-default 4.12.14-197.18.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.11.1

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