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 vfsub_dentry_open

Synthesis of the vulnerability 

An attacker can trigger a fatal error via vfsub_dentry_open() of the Linux kernel, in order to trigger a denial of service.
Impacted systems: Linux, Ubuntu.
Severity of this alert: 1/4.
Creation date: 22/07/2020.
Références of this alert: CERTFR-2020-AVI-460, CERTFR-2020-AVI-466, CVE-2020-11935, USN-4425-1, USN-4426-1, USN-4427-1, USN-4439-1, VIGILANCE-VUL-32897.

Description of the vulnerability 

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

This threat impacts software or systems such as Linux, 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: patch for vfsub_dentry_open.
A patch is indicated in information sources.

Ubuntu 18.0: new linux-image-5.0.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.0 5.0.0.1045.30

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-aws-hwe 4.15.0.1079.76
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.112.100

Ubuntu: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-generic-lts-xenial 4.4.0.186.163
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.186.192

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.4.0.42.46~18.04.35
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.30.37
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service 

Vigil@nce provides an application vulnerability database. The Vigil@nce team tracks computer vulnerabilities impacting systems and applications.