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Vulnerability of Linux kernel: memory leak via sof_dfsentry_write

Synthesis of the vulnerability 

An attacker can create a memory leak via sof_dfsentry_write() of the Linux kernel, in order to trigger a denial of service.
Vulnerable systems: Fedora, Linux.
Severity of this threat: 1/4.
Creation date: 08/11/2019.
Références of this weakness: CVE-2019-18812, FEDORA-2019-124a241044, FEDORA-2019-b86a7bdba0, VIGILANCE-VUL-30818.

Description of the vulnerability 

An attacker can create a memory leak via sof_dfsentry_write() of the Linux kernel, in order to trigger a denial of service.
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This security alert impacts software or systems such as Fedora, Linux.

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

Solutions for this threat 

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

Fedora 30: new kernel packages.
New packages are available:
  Fedora 30: kernel 5.3.14-200.fc30

Fedora 31: new kernel packages.
New packages are available:
  Fedora 31: kernel 5.3.14-300.fc31
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