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Vulnerability of Linux kernel: buffer overflow via mpol_parse_str

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via mpol_parse_str() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Debian, Linux, RHEL, Slackware, Ubuntu.
Severity of this announce: 2/4.
Creation date: 06/04/2020.
Références of this computer vulnerability: CERTFR-2020-AVI-300, CERTFR-2020-AVI-307, CERTFR-2020-AVI-312, CERTFR-2020-AVI-326, CERTFR-2020-AVI-368, CERTFR-2020-AVI-415, CVE-2020-11565, DLA-2241-1, DLA-2241-2, DLA-2242-1, DSA-4667-1, DSA-4698-1, RHSA-2020:2854-01, SSA:2020-163-01, USN-4363-1, USN-4364-1, USN-4367-1, USN-4367-2, USN-4368-1, USN-4369-1, USN-4369-2, VIGILANCE-VUL-31939.

Description of the vulnerability 

An attacker can trigger a buffer overflow via mpol_parse_str() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity announce impacts software or systems such as Debian, Linux, RHEL, Slackware, Ubuntu.

Our Vigil@nce team determined that the severity of this threat alert is medium.

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 alert.

Solutions for this threat 

Linux kernel: version 5.6.3.
The version 5.6.3 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.5.16.
The version 5.5.16 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.31.
The version 5.4.31 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.115.
The version 4.19.115 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.176.
The version 4.14.176 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.219.
The version 4.9.219 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.219.
The version 4.4.219 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.16.83.
The version 3.16.83 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.16.83.tar.xz

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

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.98-1+deb10u1

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

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.84-1

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

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-alt 4.14.0-115.26.1.el7a

Slackware 14.2: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.227-i586-1

Ubuntu 18.04 LTS: new linux-image-5.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-5.0.0-1037-gke 5.0.0-1037.38, linux-image-5.0.0-1052-oem-osp1 5.0.0-1052.57, linux-image-gke-5.0 5.0.0.1037.25, linux-image-oem-osp1 5.0.0.1052.55

Ubuntu 20.04 LTS: new linux-image-5.4.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-4.15.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-4.4.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.3.0.53.109
  Ubuntu 19.10: linux-image-generic 5.3.0.53.45

Wind River Linux: version 10.17.41.21.
The version 10.17.41.21 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.18.44.17.
The version 10.18.44.17 is fixed:
  https://support2.windriver.com/
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