CVE-2020-11565

06.04.2020, 01:15

An issue was discovered in the Linux kernel through 5.6.2. mpol_parse_str in mm/mempolicy.c has a stack-based out-of-bounds write because an empty nodelist is mishandled during mount option parsing, aka CID-aa9f7d5172fa. NOTE: Someone in the security community disagrees that this is a vulnerability because the issue “is a bug in parsing mount options which can only be specified by a privileged user, so triggering the bug does not grant any powers not already held.”

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6 MEDIUM	LOCAL	LOW	HIGH	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

Base Score

CVSS 3.x

EPSS Score

Percentile: 24%

Affected Products (NVD)

Vendor	Product	Version
linux	linux_kernel	𝑥 ≤ 5.6.2
canonical	ubuntu_linux	14.04
canonical	ubuntu_linux	16.04
canonical	ubuntu_linux	18.04
canonical	ubuntu_linux	20.04

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

linux

bookworm	6.1.106-3 fixed
bookworm (security)	6.1.112-1 fixed
bullseye	5.10.223-1 fixed
bullseye (security)	5.10.226-1 fixed
sid	6.11.6-1 fixed
trixie	6.11.5-1 fixed

Ubuntu Releases

Ubuntu Product

Codename

linux

bionic	Fixed 4.15.0-101.102 released
eoan	Fixed 5.3.0-53.47 released
focal	Fixed 5.4.0-31.35 released
trusty	ignored
xenial	Fixed 4.4.0-179.209 released

linux-aws

bionic	Fixed 4.15.0-1067.71 released
eoan	Fixed 5.3.0-1019.21 released
focal	Fixed 5.4.0-1011.11 released
trusty	Fixed 4.4.0-1067.71 released
xenial	Fixed 4.4.0-1107.118 released

linux-aws-5.0

bionic	ignored
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-aws-5.3

bionic	Fixed 5.3.0-1019.21~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-aws-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-aws-hwe

bionic	dne
eoan	dne
focal	dne
trusty	dne
xenial	Fixed 4.15.0-1067.71~16.04.1 released

linux-azure

bionic	ignored
eoan	Fixed 5.3.0-1022.23 released
focal	Fixed 5.4.0-1012.12 released
trusty	ignored
xenial	Fixed 4.15.0-1083.93~16.04.1 released

linux-azure-4.15

bionic	Fixed 4.15.0-1083.93 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-azure-5.3

bionic	Fixed 5.3.0-1022.23~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-azure-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-azure-edge

bionic	ignored
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gcp

bionic	ignored
eoan	Fixed 5.3.0-1020.22 released
focal	Fixed 5.4.0-1011.11 released
trusty	dne
xenial	Fixed 4.15.0-1071.81~16.04.1 released

linux-gcp-4.15

bionic	not-affected
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gcp-5.3

bionic	Fixed 5.3.0-1020.22~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gcp-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-gcp-edge

bionic	ignored
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gke-4.15

bionic	Fixed 4.15.0-1059.62 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gke-5.0

bionic	Fixed 5.0.0-1037.38 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-gke-5.3

bionic	Fixed 5.3.0-1020.22~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-hwe

bionic	Fixed 5.3.0-53.47~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	Fixed 4.15.0-101.102~16.04.1 released

linux-hwe-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-hwe-edge

bionic	ignored
eoan	dne
focal	dne
trusty	dne
xenial	ignored

linux-kvm

bionic	Fixed 4.15.0-1060.61 released
eoan	Fixed 5.3.0-1017.19 released
focal	Fixed 5.4.0-1011.11 released
trusty	dne
xenial	Fixed 4.4.0-1071.78 released

linux-lts-trusty

bionic	dne
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-lts-xenial

bionic	dne
eoan	dne
focal	dne
trusty	Fixed 4.4.0-179.209~14.04.1 released
xenial	dne

linux-oem

bionic	Fixed 4.15.0-1081.91 released
eoan	ignored
focal	dne
trusty	dne
xenial	ignored

linux-oem-5.6

bionic	dne
eoan	dne
focal	Fixed 5.6.0-1008.8 released
trusty	dne
xenial	dne

linux-oem-osp1

bionic	Fixed 5.0.0-1052.57 released
eoan	ignored
focal	dne
trusty	dne
xenial	dne

linux-oracle

bionic	Fixed 4.15.0-1039.43 released
eoan	Fixed 5.3.0-1018.20 released
focal	Fixed 5.4.0-1011.11 released
trusty	dne
xenial	Fixed 4.15.0-1039.43~16.04.1 released

linux-oracle-5.0

bionic	ignored
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-oracle-5.3

bionic	Fixed 5.3.0-1018.20~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-oracle-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-raspi

bionic	dne
eoan	dne
focal	Fixed 5.4.0-1011.11 released
trusty	dne
xenial	dne

linux-raspi-5.4

bionic	not-affected
focal	dne
trusty	dne
xenial	dne

linux-raspi2

bionic	Fixed 4.15.0-1062.66 released
eoan	Fixed 5.3.0-1025.27 released
focal	ignored
trusty	dne
xenial	Fixed 4.4.0-1133.142 released

linux-raspi2-5.3

bionic	Fixed 5.3.0-1026.28~18.04.1 released
eoan	dne
focal	dne
trusty	dne
xenial	dne

linux-riscv

bionic	dne
eoan	dne
focal	Fixed 5.4.0-26.30 released
trusty	dne
xenial	dne

linux-snapdragon

bionic	Fixed 4.15.0-1079.86 released
eoan	dne
focal	dne
trusty	dne
xenial	Fixed 4.4.0-1137.145 released

Red Hat Enterprise Linux Releases

Red Hat Product

Release

bpftool

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-abi-whitelists

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-bootwrapper

RHEL 7

0:3.10.0-1160.el7

fixed

kernel-core

RHEL 8

0:4.18.0-240.el8

fixed

kernel-debug

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-debug-core

RHEL 8

0:4.18.0-240.el8

fixed

kernel-debug-devel

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-debug-modules

RHEL 8

0:4.18.0-240.el8

fixed

kernel-debug-modules-extra

RHEL 8

0:4.18.0-240.el8

fixed

kernel-devel

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-doc

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-kdump

RHEL 7

0:3.10.0-1160.el7

fixed

kernel-kdump-devel

RHEL 7

0:3.10.0-1160.el7

fixed

kernel-modules

RHEL 8

0:4.18.0-240.el8

fixed

kernel-modules-extra

RHEL 8

0:4.18.0-240.el8

fixed

kernel-rt

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-core

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-debug

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-debug-core

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-debug-devel

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-debug-kvm

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-debug-modules

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-debug-modules-extra

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-devel

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-doc

RHEL 7

0:3.10.0-1160.rt56.1131.el7

fixed

kernel-rt-kvm

RHEL 7	0:3.10.0-1160.rt56.1131.el7 fixed
RHEL 8	0:4.18.0-240.rt7.54.el8 fixed

kernel-rt-modules

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-modules-extra

RHEL 8

0:4.18.0-240.rt7.54.el8

fixed

kernel-rt-trace

RHEL 7

0:3.10.0-1160.rt56.1131.el7

fixed

kernel-rt-trace-devel

RHEL 7

0:3.10.0-1160.rt56.1131.el7

fixed

kernel-rt-trace-kvm

RHEL 7

0:3.10.0-1160.rt56.1131.el7

fixed

kernel-tools

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-tools-libs

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-tools-libs-devel

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

kernel-zfcpdump

RHEL 8

0:4.18.0-240.el8

fixed

kernel-zfcpdump-core

RHEL 8

0:4.18.0-240.el8

fixed

kernel-zfcpdump-devel

RHEL 8

0:4.18.0-240.el8

fixed

kernel-zfcpdump-modules

RHEL 8

0:4.18.0-240.el8

fixed

kernel-zfcpdump-modules-extra

RHEL 8

0:4.18.0-240.el8

fixed

perf

RHEL 7	0:3.10.0-1160.el7 fixed
RHEL 8	0:4.18.0-240.el8 fixed

python-perf

RHEL 7

0:3.10.0-1160.el7

fixed

python3-perf

RHEL 8

0:4.18.0-240.el8

fixed

Common Weakness Enumeration

CWE-787 - Out-of-bounds Write
The software writes data past the end, or before the beginning, of the intended buffer.

References

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd

https://github.com/torvalds/linux/commit/aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd

https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html

https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html

https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html

https://usn.ubuntu.com/4363-1/

https://usn.ubuntu.com/4364-1/

https://usn.ubuntu.com/4367-1/

https://usn.ubuntu.com/4368-1/

https://usn.ubuntu.com/4369-1/

https://www.debian.org/security/2020/dsa-4667

https://www.debian.org/security/2020/dsa-4698

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd

https://github.com/torvalds/linux/commit/aa9f7d5172fac9bf1f09e678c35e287a40a7b7dd

https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html

https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html

https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html

https://usn.ubuntu.com/4363-1/

https://usn.ubuntu.com/4364-1/

https://usn.ubuntu.com/4367-1/

https://usn.ubuntu.com/4368-1/

https://usn.ubuntu.com/4369-1/

https://www.debian.org/security/2020/dsa-4667

https://www.debian.org/security/2020/dsa-4698