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Vulnerability of Linux kernel: out-of-bounds memory reading via wait_til_ready

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via wait_til_ready() of the Linux kernel, in order to trigger a denial of service, or to obtain sensitive information.
Impacted software: Debian, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 2/4.
Creation date: 27/03/2020.
Références of this announce: CERTFR-2020-AVI-241, CERTFR-2020-AVI-242, CERTFR-2020-AVI-252, CERTFR-2020-AVI-256, CERTFR-2020-AVI-260, CERTFR-2020-AVI-281, CERTFR-2020-AVI-318, CERTFR-2020-AVI-368, CVE-2020-9383, DLA-2241-1, DLA-2241-2, DLA-2242-1, DSA-4698-1, openSUSE-SU-2020:0388-1, RHSA-2020:2104-01, SSA:2020-086-01, SUSE-SU-2020:0836-1, SUSE-SU-2020:1084-1, SUSE-SU-2020:1085-1, SUSE-SU-2020:1087-1, SUSE-SU-2020:1118-1, SUSE-SU-2020:1119-1, SUSE-SU-2020:1123-1, SUSE-SU-2020:1141-1, SUSE-SU-2020:1142-1, SUSE-SU-2020:1255-1, SUSE-SU-2020:14354-1, SUSE-SU-2020:1663-1, USN-4342-1, USN-4344-1, USN-4345-1, USN-4346-1, VIGILANCE-VUL-31888.

Description of the vulnerability 

An attacker can force a read at an invalid address via wait_til_ready() of the Linux kernel, in order to trigger a denial of service, or to obtain sensitive information.
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This computer threat impacts software or systems such as Debian, Linux, openSUSE Leap, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer vulnerability alert is medium.

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 weakness.

Solutions for this threat 

Linux kernel: version 5.5.7.
The version 5.5.7 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.23.
The version 5.4.23 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.107.
The version 4.19.107 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.172.
The version 4.14.172 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.215.
The version 4.9.215 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.215.
The version 4.4.215 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 3.16.83.
The version 3.16.83 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v3.x/linux-3.16.83.tar.xz

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

Debian 8: new linux-4.9 packages.
New packages are available:
  Debian 8: linux-4.9 4.9.210-1+deb9u1~deb8u1

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.84-1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.210-1+deb9u1

openSUSE Leap 15.1: new kernel packages.
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.44.1

RHEL 7: new kernel-alt packages.
New packages are available:
  RHEL 7.0-7.8: kernel-alt 4.14.0-115.21.2.el7a

Slackware 14.2: new kernel packages (27/03/2020).
New packages are available:
  Slackware 14.2: kernel 4.4.217-i586-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.111.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel-default 4.4.121-92.129.1

SUSE LE 12 SP4: new kernel-default-kgraft packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default-kgraft 4.12.14-95.51.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.18.1

SUSE LE 12 SP4, SP5: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.13.1
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.40.1

SUSE LE 12 SP5: new kernel-default-kgraft packages.
New packages are available:
  SUSE LE 12 SP5: kernel-default-kgraft 4.12.14-122.20.1

SUSE LE 12 SP5: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.8.1

SUSE LE 15: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.52.1

SUSE LE 15 SP1: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.30.1

SUSE LE 15 SP1: new kernel packages (01/04/2020).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.37.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.23.1

Ubuntu 18.04 LTS: new linux-image-5.0.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-4.15.0 packages (29/04/2020).
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-4.4.0 packages.
New packages are available, as indicated in information sources.

Ubuntu: new linux-image-5.3.0 packages (29/04/2020).
New packages are available, as indicated in information sources.

Wind River Linux: version 10.17.41.20.
The version 10.17.41.20 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.18.44.15.
The version 10.18.44.15 is fixed:
  https://support2.windriver.com/

Wind River Linux: version 10.19.45.7.
The version 10.19.45.7 is fixed:
  https://support2.windriver.com/
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