The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of Linux kernel: denial of service via Zram Sysfs

Synthesis of the vulnerability 

An attacker can trigger a fatal error via Zram Sysfs of the Linux kernel, in order to trigger a denial of service.
Impacted systems: Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 1/4.
Creation date: 18/06/2020.
Références of this alert: CERTFR-2020-AVI-483, CERTFR-2020-AVI-541, CERTFR-2020-AVI-547, CVE-2020-10781, openSUSE-SU-2020:1153-1, openSUSE-SU-2020:1236-1, SUSE-SU-2020:2102-1, SUSE-SU-2020:2103-1, SUSE-SU-2020:2105-1, SUSE-SU-2020:2107-1, SUSE-SU-2020:2119-1, SUSE-SU-2020:2122-1, SUSE-SU-2020:2478-1, SUSE-SU-2020:2487-1, USN-4483-1, USN-4485-1, VIGILANCE-VUL-32567.

Description of the vulnerability 

An attacker can trigger a fatal error via Zram Sysfs of the Linux kernel, in order to trigger a denial of service.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

This security note impacts software or systems such as Linux, openSUSE Leap, 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.

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

Solutions for this threat 

Linux kernel: version 5.7.10.
The version 5.7.10 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.53.
The version 5.4.53 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.134.
The version 4.19.134 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.189.
The version 4.14.189 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: patch for Zram Sysfs.
A patch 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 15.2: new kernel packages.
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.36.1

SUSE LE 12 SP5: new kernel-azure packages (05/08/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.22.1

SUSE LE 12 SP5: new kernel packages (05/08/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.29.1

SUSE LE 12 SP5: new kernel-rt packages (03/09/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.13.1

SUSE LE 15 SP1: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.38.1

SUSE LE 15 SP1: new kernel packages (04/08/2020).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.48.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.28.1

SUSE LE 15 SP2: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.12.1

SUSE LE 15 SP2: new kernel packages.
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.9.1

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1093.70
  Ubuntu 16.04 LTS: linux-image-gcp 4.15.0.1081.83
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.115.103

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gcp 5.4.0.1022.9
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.45.49
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides networks vulnerabilities analysis. The Vigil@nce vulnerability database contains several thousand vulnerabilities.