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Vulnerability of Linux kernel: memory leak via UMD copy_process

Synthesis of the vulnerability 

An attacker can create a memory leak via UMD copy_process() of the Linux kernel, in order to trigger a denial of service.
Impacted software: Fedora, Linux, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 31/03/2021.
Références of this announce: CVE-2021-29649, FEDORA-2021-2306e89112, FEDORA-2021-6b0f287b8b, USN-4948-1, VIGILANCE-VUL-34984.

Description of the vulnerability 

An attacker can create a memory leak via UMD copy_process() of the Linux kernel, in order to trigger a denial of service.
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This vulnerability bulletin impacts software or systems such as Fedora, Linux, Ubuntu.

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 

Linux kernel: version 5.11.11.
The version 5.11.11 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.10.27.
The version 5.10.27 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

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

Fedora 32-33: new kernel-headers packages.
New packages are available:
  Fedora 32: kernel-headers 5.11.11-100.fc32
  Fedora 33: kernel-headers 5.11.11-200.fc33

Fedora 32-33: new kernel packages.
New packages are available:
  Fedora 32: kernel 5.11.11-100.fc32
  Fedora 33: kernel 5.11.11-200.fc33

Fedora 32-33: new kernel-tools packages.
New packages are available:
  Fedora 32: kernel-tools 5.11.11-100.fc32
  Fedora 33: kernel-tools 5.11.11-200.fc33

Ubuntu: new linux-image-5.10,0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-5.10.0-1026-oem 5.10.0-1026.27, linux-image-oem-20.04b 5.10.0.1026.27
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