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Vulnerability of Linux kernel: memory leak via kernel_read_file

Synthesis of the vulnerability 

An attacker can create a memory leak via kernel_read_file() of the Linux kernel, in order to trigger a denial of service.
Vulnerable software: Debian, Fedora, Linux, openSUSE Leap, RHEL, SIMATIC, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 1/4.
Creation date: 22/02/2019.
Références of this computer vulnerability: CERTFR-2019-AVI-131, CERTFR-2019-AVI-145, CERTFR-2020-AVI-243, CERTFR-2020-AVI-253, CVE-2019-8980, DLA-1771-1, FEDORA-2019-196ab64d65, FEDORA-2019-7462acf8ba, openSUSE-SU-2019:1193-1, RHSA-2020:1567-01, RHSA-2020:1769-01, RHSA-2020:1966-01, SSB-439005, SUSE-SU-2019:0765-1, SUSE-SU-2019:0767-1, USN-3930-1, USN-3930-2, USN-3931-1, USN-3931-2, VIGILANCE-VUL-28585.

Description of the vulnerability 

An attacker can create a memory leak via kernel_read_file() of the Linux kernel, in order to trigger a denial of service.
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This threat impacts software or systems such as Debian, Fedora, Linux, openSUSE Leap, RHEL, SIMATIC, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: version 5.0.1.
The version 5.0.1 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.20.15.
The version 4.20.15 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.19.28.
The version 4.19.28 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.106.
The version 4.14.106 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.163.
The version 4.9.163 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.168-1~deb8u1

Fedora 28: new kernel-headers packages.
New packages are available:
  Fedora 28: kernel-headers 4.20.14-100.fc28

Fedora 29: new kernel-headers packages.
New packages are available:
  Fedora 29: kernel-headers 4.20.12-200.fc29

Fedora 29: new kernel packages.
New packages are available:
  Fedora 29: kernel 4.20.12-200.fc29

openSUSE Leap 15.0: new kernel packages.
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.58.1

RHEL 8: new kernel packages.
New packages are available:
  RHEL 8.0-8.1: kernel 4.18.0-193.el8

RHEL 8: new kernel-rt packages.
New packages are available:
  RHEL 8.0-8.1: kernel-rt 4.18.0-193.rt13.51.el8

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 4.12.14-6.9.1

SUSE LE 12 SP4: new kernel packages (27/03/2019).
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.13.1

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 LTS: linux-image-azure 4.15.0.1041.28
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.47.68
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.47.49

Ubuntu: new linux-image-4.18.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 4.18.0.17.67
  Ubuntu 18.10: linux-image-generic 4.18.0.17.18

Wind River Linux: solution (21/05/2019).
The solution is indicated in information sources.
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