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Vulnerability of Linux kernel: use after free via i915_ppgtt_close

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via i915_ppgtt_close() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Android OS, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this threat: 2/4.
Creation date: 15/01/2020.
Références of this weakness: CERTFR-2020-AVI-060, CERTFR-2020-AVI-096, CERTFR-2020-AVI-119, CERTFR-2020-AVI-124, CERTFR-2020-AVI-130, CERTFR-2020-AVI-148, CVE-2020-7053, openSUSE-SU-2020:0336-1, SUSE-SU-2020:0511-1, SUSE-SU-2020:0558-1, SUSE-SU-2020:0559-1, SUSE-SU-2020:0560-1, SUSE-SU-2020:0580-1, SUSE-SU-2020:0599-1, SUSE-SU-2020:0605-1, SUSE-SU-2020:1663-1, USN-4255-1, USN-4255-2, USN-4285-1, USN-4287-1, USN-4287-2, VIGILANCE-VUL-31340.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via i915_ppgtt_close() of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity note impacts software or systems such as Android OS, Linux, openSUSE Leap, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: patch for i915_ppgtt_close.
A patch is indicated in information sources.

Google Android/Pixel: patch for September 2020.
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 SP4: new kernel-azure packages (03/03/2020).
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.37.1

SUSE LE 12 SP4: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP4: kernel-rt 4.12.14-8.12.1

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

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

Ubuntu 18.04: new linux-image-5.0.0 packages (19/02/2020).
New packages are available:
  Ubuntu 18.04 LTS: linux-image-azure 5.0.0.1032.43

Ubuntu: new linux-image-4.15.0 packages (19/02/2020).
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.88.80
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.88.98
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1069.55

Ubuntu: new linux-image-4.15.0 packages (28/01/2020).
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.76.96
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.76.78

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