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Vulnerability of Linux kernel: use after free via fs/xfs/xfs_super.c

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via fs/xfs/xfs_super.c of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
Impacted software: Debian, Linux, openSUSE Leap, RHEL, RSA Authentication Manager, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this computer vulnerability: 1/4.
Creation date: 25/09/2019.
Références of this announce: CERTFR-2019-AVI-455, CERTFR-2019-AVI-478, CERTFR-2019-AVI-502, CERTFR-2019-AVI-503, CERTFR-2019-AVI-530, CERTFR-2019-AVI-561, CERTFR-2019-AVI-575, CERTFR-2020-AVI-051, CERTFR-2020-AVI-095, CERTFR-2020-AVI-114, CERTFR-2020-AVI-123, CERTFR-2020-AVI-125, CVE-2018-20976, DLA-1930-1, DLA-2114-1, DSA-2019-189, openSUSE-SU-2019:2173-1, openSUSE-SU-2019:2181-1, RHSA-2020:0178-01, RHSA-2020:0543-01, RHSA-2020:0592-01, RHSA-2020:0609-01, RHSA-2020:0661-01, SSA:2019-311-01, SUSE-SU-2019:14218-1, SUSE-SU-2019:2412-1, SUSE-SU-2019:2424-1, SUSE-SU-2019:2648-1, SUSE-SU-2019:2651-1, SUSE-SU-2019:2658-1, SUSE-SU-2019:2738-1, SUSE-SU-2019:2949-1, SUSE-SU-2019:2950-1, SUSE-SU-2019:2984-1, USN-4144-1, USN-4145-1, VIGILANCE-VUL-30400.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via fs/xfs/xfs_super.c of the Linux kernel, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity weakness impacts software or systems such as Debian, Linux, openSUSE Leap, RHEL, RSA Authentication Manager, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: version 4.18.
The version 4.18 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.150.
The version 4.14.150 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.197.
The version 4.9.197 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.197.
The version 4.4.197 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Debian 8: new linux packages.
New packages are available:
  Debian 8: linux 3.16.74-1

openSUSE Leap 15: new kernel packages.
New packages are available:
  openSUSE Leap 15.0: kernel 4.12.14-lp150.12.73.1
  openSUSE Leap 15.1: kernel 4.12.14-lp151.28.16.1

RHEL 6 MRG: new kernel-rt packages.
New packages are available:
  RHEL 6.0-6.10: kernel-rt 3.10.0-693.64.1.rt56.662.el6rt

RHEL 7.2: new kernel packages.
New packages are available:
  RHEL 7.2: kernel 3.10.0-327.85.1.el7

RHEL 7.3: new kernel packages.
New packages are available:
  RHEL 7.3: kernel 3.10.0-514.72.1.el7

RHEL 7.4: new kernel packages.
New packages are available:
  RHEL 7.0-7.7: kernel 3.10.0-693.64.1.el7

RHEL 7.5: new kernel packages.
New packages are available:
  RHEL 7.0-7.7: kernel 3.10.0-862.48.1.el7

RSA Authentication Manager: version 8.4 Patch 9.
The version 8.4 Patch 9 is fixed:
  https://www.dell.com/support/

Slackware 14.2: new kernel packages.
New packages are available:
  Slackware 14.2: kernel 4.4.199-*-1

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.108.1

SUSE LE 12 SP1: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP1: kernel 3.12.74-60.64.124.1

SUSE LE 12 SP2: new kernel packages.
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.125.1

SUSE LE 12 SP3: new kernel packages (13/11/2019).
New packages are available:
  SUSE LE 12 SP3: kernel 4.4.180-94.107.1

SUSE LE 12 SP4: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP4: kernel-azure 4.12.14-6.26.1

SUSE LE 12 SP4: new kernel-default packages.
New packages are available:
  SUSE LE 12 SP4: kernel-default 4.12.14-95.32.1

SUSE LE 15: new kernel-azure packages.
New packages are available:
  SUSE LE 15 RTM: kernel-azure 4.12.14-5.41.1
  SUSE LE 15 SP1: kernel-azure 4.12.14-8.16.1

SUSE LE 15 SP1: new kernel-default packages.
New packages are available:
  SUSE LE 15 SP1: kernel-default 4.12.14-197.18.1

SUSE LE 15 SP1: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP1: kernel-rt 4.12.14-14.11.1

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.65.67
  Ubuntu 16.04 LTS: linux-image-generic-hwe-16.04 4.15.0.65.85

Ubuntu: new linux-image-4.4.0 packages.
New packages are available:
  Ubuntu 16.04 LTS: linux-image-generic 4.4.0.165.173

Wind River Linux: version 10.17.41.19.
The version 10.17.41.19 is fixed.
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