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CVE-2020-12657

Published: 5 May 2020

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

From the Ubuntu security team

It was discovered that the block layer in the Linux kernel contained a race condition leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code.

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-101.102)
eoan
Released (5.3.0-53.47)
focal
Released (5.4.0-31.35)
groovy Not vulnerable
(5.4.0-42.46)
precise Not vulnerable
(3.0.0-12.20)
trusty Not vulnerable
(3.11.0-12.19)
upstream
Released (5.7~rc1)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

aee69d78dec0ffdf82e35d57c626e80dddc314d5

Fixed by 2f95fa5c955d0a9987ffdc3a095e2f4e62c5f2a9
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1067.71)
eoan
Released (5.3.0-1019.21)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1020.20)
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (5.7~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1019.21~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1067.71~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan
Released (5.3.0-1022.23)
focal
Released (5.4.0-1012.12)
groovy Not vulnerable
(5.4.0-1022.22)
precise Does not exist

trusty
Released (4.15.0-1083.93~14.04.1)
upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1083.93~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1083.93)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1022.23~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1005.8)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan
Released (5.3.0-1020.22)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1021.21)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1071.81~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1071.81)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1020.22~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1059.62)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1037.38)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1020.22~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gkeop
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.4.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1001.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-53.47~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-101.102~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-37.41~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-hwe-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.8.0-23.24~20.04.1)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1060.61)
eoan
Released (5.3.0-1017.19)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1015.15)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Not vulnerable
(3.13.0-24.46~precise1)
trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (5.7~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1081.91)
eoan Ignored
(reached end-of-life)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.10.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal
Released (5.6.0-1010.10)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1052.57)
eoan Ignored
(reached end-of-life)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1039.43)
eoan
Released (5.3.0-1018.20)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1021.21)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1039.43~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1018.20~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1012.12)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1062.66)
eoan
Released (5.3.0-1025.27)
focal Ignored
(was needs-triage now end-of-life)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Not vulnerable
(4.2.0-1013.19)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1026.28~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal
Released (5.4.0-26.30)
groovy Not vulnerable
(5.4.0-27.31)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1079.86)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Not vulnerable
(4.4.0-1013.15)