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: memory corruption via xdp_umem_reg

Synthesis of the vulnerability 

An attacker can trigger a memory corruption via xdp_umem_reg() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Linux, openSUSE Leap, SLES, Ubuntu.
Severity of this threat: 1/4.
Creation date: 10/06/2020.
Références of this weakness: CERTFR-2020-AVI-356, CERTFR-2020-AVI-376, CVE-2020-12659, openSUSE-SU-2020:0801-1, SUSE-SU-2020:1599-1, USN-4387-1, USN-4388-1, USN-4389-1, VIGILANCE-VUL-32510.

Description of the vulnerability 

An attacker can trigger a memory corruption via xdp_umem_reg() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This computer threat alert impacts software or systems such as Linux, openSUSE Leap, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness announce is low.

The trust level is of type confirmed by the editor, with an origin of privileged shell.

An attacker with a expert ability can exploit this computer weakness bulletin.

Solutions for this threat 

Linux kernel: version 5.6.7.
The version 5.6.7 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.35.
The version 5.4.35 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.118.
The version 4.19.118 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.52.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.45.1

Ubuntu 18.04: new linux-gke-5.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-gke-5.0 5.0.0.1042.27

Ubuntu 20.04: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.37.40

Ubuntu: new linux-image-5.3.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.3.0.59.113
  Ubuntu 19.10: linux-image-generic 5.3.0.59.49
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