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 cpu.cfs_quota_us

Synthesis of the vulnerability 

An attacker can trigger a fatal error via cpu.cfs_quota_us of the Linux kernel, in order to trigger a denial of service.
Vulnerable systems: Debian, Linux, RHEL, Ubuntu.
Severity of this threat: 1/4.
Creation date: 23/12/2019.
Références of this weakness: CERTFR-2020-AVI-005, CERTFR-2020-AVI-230, CERTFR-2020-AVI-243, CERTFR-2020-AVI-253, CVE-2019-19922, DLA-2068-1, RHSA-2020:1493-01, RHSA-2020:1567-01, RHSA-2020:1769-01, RHSA-2020:1966-01, USN-4226-1, VIGILANCE-VUL-31232.

Description of the vulnerability 

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

This security bulletin impacts software or systems such as Debian, Linux, RHEL, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity 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 vulnerability alert.

Solutions for this threat 

Linux kernel: version 5.3.9.
The version 5.3.9 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

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

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.81-1

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-alt 4.14.0-115.19.1.el7a

RHEL 8: new kernel packages (29/04/2020).
New packages are available:
  RHEL 8.0-8.1: kernel 4.18.0-193.el8

RHEL 8: new kernel-rt packages (29/04/2020).
New packages are available:
  RHEL 8.0-8.1: kernel-rt 4.18.0-193.rt13.51.el8

Ubuntu: new linux-image-5.0.0 packages (07/01/2020).
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

Wind River Linux: version 10.19.45.3.
The version 10.19.45.3 is fixed:
  https://support2.windriver.com/
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides a software vulnerability note. The technology watch team tracks security threats targeting the computer system.