Vulnerability of Linux kernel: denial of service via sg_write

Synthesis of the vulnerability

An attacker can trigger a fatal error via sg_write() of the Linux kernel, in order to trigger a denial of service.

Impacted software: Fedora, Linux.

Severity of this computer vulnerability: 1/4.

Creation date: 11/05/2020.

Références of this announce: CVE-2020-12770, FEDORA-2020-4c69987c40, FEDORA-2020-5a69decc0c, FEDORA-2020-c6b9fff7f8, VIGILANCE-VUL-32224.

Description of the vulnerability

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

This weakness impacts software or systems such as Fedora, Linux.

Our Vigil@nce team determined that the severity of this vulnerability announce 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 threat bulletin.

Solutions for this threat

Linux kernel: version 5.6.12.
The version 5.6.12 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.42.
The version 5.4.42 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.42.tar.xz

Linux kernel: version 4.19.124.
The version 4.19.124 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.19.124.tar.xz

Linux kernel: version 4.14.181.
The version 4.14.181 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.14.181.tar.xz

Linux kernel: version 4.9.224.
The version 4.9.224 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.9.224.tar.xz

Linux kernel: version 4.4.224.
The version 4.4.224 is fixed:
https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.4.224.tar.xz

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

Fedora 30-31: new kernel packages.
New packages are available:
Fedora 30: kernel 5.6.13-100.fc30
Fedora 31: kernel 5.6.13-200.fc31

Fedora 32: new kernel packages.
New packages are available:
Fedora 32: kernel 5.6.12-300.fc32

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

Wind River Linux: version 10.19.45.8.
The version 10.19.45.8 is fixed.
Full bulletin, software filtering, emails, fixes, ... (Request your free trial)

Computer vulnerabilities tracking service

Vigil@nce provides a software vulnerabilities note. The Vigil@nce vulnerability database contains several thousand vulnerabilities.