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Vulnerability of Linux kernel: code execution via futex_lock_pi

Synthesis of the vulnerability 

An attacker can use a vulnerability via futex_lock_pi() of the Linux kernel, in order to run code.
Impacted systems: Debian, Fedora, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this alert: 2/4.
Creation date: 29/01/2021.
Références of this alert: CERTFR-2021-AVI-077, CERTFR-2021-AVI-111, CERTFR-2021-AVI-120, CERTFR-2021-AVI-125, CERTFR-2021-AVI-138, CERTFR-2021-AVI-191, CERTFR-2021-AVI-200, CERTFR-2021-AVI-211, CERTFR-2021-AVI-242, CERTFR-2021-AVI-265, CVE-2021-3347, DLA-2557-1, DLA-2586-1, DSA-4843-1, FEDORA-2021-6e805a5051, FEDORA-2021-879c756377, openSUSE-SU-2021:0241-1, RHSA-2021:1081-01, RHSA-2021:1093-01, SUSE-SU-2021:0347-1, SUSE-SU-2021:0348-1, SUSE-SU-2021:0353-1, SUSE-SU-2021:0354-1, SUSE-SU-2021:0427-1, SUSE-SU-2021:0433-1, SUSE-SU-2021:0434-1, SUSE-SU-2021:0437-1, SUSE-SU-2021:0438-1, SUSE-SU-2021:0532-1, SUSE-SU-2021:14630-1, USN-4878-1, USN-4884-1, USN-4907-1, USN-4910-1, VIGILANCE-VUL-34433.

Description of the vulnerability 

An attacker can use a vulnerability via futex_lock_pi() of the Linux kernel, in order to run code.
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This computer threat note impacts software or systems such as Debian, Fedora, Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

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

Solutions for this threat 

Linux kernel: version 5.10.12.
The version 5.10.12 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 5.4.94.
The version 5.4.94 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v5.x/

Linux kernel: version 4.19.172.
The version 4.19.172 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.14.218.
The version 4.14.218 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.9.258.
The version 4.9.258 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

Linux kernel: version 4.4.260.
The version 4.4.260 is fixed:
  https://cdn.kernel.org/pub/linux/kernel/v4.x/

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

Debian 10: new linux packages.
New packages are available:
  Debian 10: linux 4.19.171-2

Debian 9: new linux-4.19 packages.
New packages are available:
  Debian 9: linux-4.19 4.19.171-2~deb9u1

Debian 9: new linux packages.
New packages are available:
  Debian 9: linux 4.9.258-1

Fedora 32-33: new kernel packages.
New packages are available:
  Fedora 32: kernel 5.10.12-100.fc32
  Fedora 33: kernel 5.10.12-200.fc33

openSUSE Leap 15.2: new kernel packages.
New packages are available:
  openSUSE Leap 15.2: kernel 5.3.18-lp152.63.1

RHEL 8.3: new kernel packages.
New packages are available:
  RHEL 8.3: kernel 4.18.0-240.22.1.el8_3

RHEL 8.3: new kernel-rt packages.
New packages are available:
  RHEL 8.3: kernel-rt 4.18.0-240.22.1.rt7.77.el8_3

SUSE LE 11 SP4: new kernel packages.
New packages are available:
  SUSE LE 11 SP4: kernel 3.0.101-108.120.1

SUSE LE 12 SP2: new kernel packages (11/02/2021).
New packages are available:
  SUSE LE 12 SP2: kernel 4.4.121-92.149.1

SUSE LE 12 SP4: new kernel packages.
New packages are available:
  SUSE LE 12 SP4: kernel 4.12.14-95.68.1

SUSE LE 12 SP5: new kernel-azure packages.
New packages are available:
  SUSE LE 12 SP5: kernel-azure 4.12.14-16.44.1

SUSE LE 12 SP5: new kernel packages.
New packages are available:
  SUSE LE 12 SP5: kernel 4.12.14-122.60.1

SUSE LE 12 SP5: new kernel-rt packages.
New packages are available:
  SUSE LE 12 SP5: kernel-rt 4.12.14-10.31.1

SUSE LE 15 RTM: new kernel packages.
New packages are available:
  SUSE LE 15 RTM: kernel 4.12.14-150.66.1

SUSE LE 15 SP1: new kernel packages.
New packages are available:
  SUSE LE 15 SP1: kernel 4.12.14-197.83.1

SUSE LE 15 SP2: new kernel-azure packages.
New packages are available:
  SUSE LE 15 SP2: kernel-azure 5.3.18-18.35.2

SUSE LE 15 SP2: new kernel packages (09/02/2021).
New packages are available:
  SUSE LE 15 SP2: kernel 5.3.18-24.49.3

SUSE LE 15 SP2: new kernel-rt packages.
New packages are available:
  SUSE LE 15 SP2: kernel-rt 5.3.18-25.1

Ubuntu 20.04: new linux-image-5.10.0-1017-oem packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-5.10.0-1017-oem 5.10.0-1017.18

Ubuntu: new linux-image-4.15.0 packages.
New packages are available:
  Ubuntu 14.04 ESM: linux-image-azure 4.15.0.1112.85
  Ubuntu 16.04 LTS: linux-image-azure 4.15.0.1112.103
  Ubuntu 18.04 LTS: linux-image-generic 4.15.0.141.128

Ubuntu: new linux-image-5.4.0 packages.
New packages are available:
  Ubuntu 18.04 LTS: linux-image-generic-hwe-18.04 5.4.0.67.75~18.04.62
  Ubuntu 20.04 LTS: linux-image-generic 5.4.0.67.70

Ubuntu: new linux-image-5.8.0 packages.
New packages are available:
  Ubuntu 20.04 LTS: linux-image-generic-hwe-20.04 5.8.0.49.55~20.04.33
  Ubuntu 20.10: linux-image-generic 5.8.0.49.54
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