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Vulnerability of Linux kernel: out-of-bounds memory reading via f2fs ttm_put_pages

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via f2fs ttm_put_pages() of the Linux kernel, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable products: Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.
Severity of this weakness: 1/4.
Creation date: 28/02/2020.
Références of this bulletin: CERTFR-2020-AVI-119, CERTFR-2020-AVI-124, CERTFR-2020-AVI-130, CERTFR-2020-AVI-148, CVE-2019-19927, openSUSE-SU-2020:0336-1, SUSE-SU-2020:0511-1, SUSE-SU-2020:0558-1, SUSE-SU-2020:0560-1, SUSE-SU-2020:0580-1, SUSE-SU-2020:0605-1, VIGILANCE-VUL-31698.

Description of the vulnerability 

An attacker can force a read at an invalid address via f2fs ttm_put_pages() of the Linux kernel, in order to trigger a denial of service, or to obtain sensitive information.
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This security alert impacts software or systems such as Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES.

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 

SUSE LE 15 SP1: new kernel-azure packages (28/02/2020).
New packages are available:
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.27.1

Linux kernel: patch for f2fs ttm_put_pages.
A patch is indicated in information sources.

openSUSE Leap 15.1: new kernel packages (13/03/2020).
New packages are available:
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.40.1

SUSE LE 12 SP5: new kernel-azure packages (03/03/2020).
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.10.1

SUSE LE 12 SP5: new kernel packages (04/03/2020).
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.17.1

SUSE LE 12 SP5: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-6.3.1

SUSE LE 15 SP1: new kernel packages (03/03/2020).
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.34.1
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