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Vulnerability of RHEL: denial of service via Core Dumping mmget_not_zero

Synthesis of the vulnerability 

An attacker can trigger a fatal error via Core Dumping mmget_not_zero() of RHEL, in order to trigger a denial of service.
Vulnerable systems: RHEL.
Severity of this threat: 1/4.
Creation date: 04/02/2020.
Références of this weakness: CERTFR-2020-AVI-071, CVE-2019-14898, RHBUG-1774671, RHSA-2020:0328-01, RHSA-2020:0339-01, RHSA-2020:0374-01, RHSA-2020:0375-01, VIGILANCE-VUL-31508.

Description of the vulnerability 

An attacker can trigger a fatal error via Core Dumping mmget_not_zero() of RHEL, in order to trigger a denial of service.
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This vulnerability bulletin impacts software or systems such as RHEL.

Our Vigil@nce team determined that the severity of this security note 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 note.

Solutions for this threat 

RHEL 7: new kernel packages.
New packages are available:
  RHEL 7.0-7.7: kernel 3.10.0-1062.12.1.el7

RHEL 7: new kernel-rt packages.
New packages are available:
  RHEL 7.0-7.7: kernel-rt 3.10.0-1062.12.1.rt56.1042.el7

RHEL 8.1: new kernel packages.
New packages are available:
  RHEL 8.1: kernel 4.18.0-147.5.1.el8_1

RHEL 8.1: new kernel-rt packages.
New packages are available:
  RHEL 8.1: kernel-rt 4.18.0-147.5.1.rt24.98.el8_1

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