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CVE-2021-22543

Published: 26 May 2021

An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.

From the Ubuntu security team

It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code.

Priority

Medium

CVSS 3 base score: 7.8

Status

Package Release Status
linux-aws-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(was needed now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

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

hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

focal
Released (5.8.0-1043.46~20.04.1)
jammy Does not exist

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

focal Ignored
(was needed now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

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

focal Ignored
(was needed now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

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

focal Ignored
(was needed now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

linux-aws
Launchpad, Ubuntu, Debian
hirsute
Released (5.11.0-1017.18)
upstream
Released (5.13)
xenial Not vulnerable
(4.4.0-1001.10)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1005.6)
trusty Not vulnerable
(4.4.0-1002.2)
jammy Not vulnerable
(5.13.0-1005.6)
bionic
Released (4.15.0-1112.119)
focal
Released (5.4.0-1056.59)
linux-aws-5.0
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

hirsute Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

hirsute Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic
Released (5.4.0-1056.59~18.04.1)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial
Released (4.15.0-1112.119~16.04.1)
groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

linux-azure
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
focal
Released (5.4.0-1058.60)
hirsute
Released (5.11.0-1015.16)
trusty
Released (4.15.0-1124.137~14.04.1)
xenial
Released (4.15.0-1124.137~16.04.1)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1004.5)
jammy Not vulnerable
(5.13.0-1006.7)
bionic Ignored
(superseded by linux-azure-5.3)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1124.137)
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

hirsute Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic
Released (5.4.0-1058.60~18.04.1)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

hirsute Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1028.33)
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
focal
Released (5.4.0-1052.56)
trusty Does not exist

xenial
Released (4.15.0-1109.123~16.04.1)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1003.4)
hirsute
Released (5.11.0-1018.20)
jammy Not vulnerable
(5.13.0-1005.6)
bionic Ignored
(superseded by linux-gcp-5.3)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1109.123)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

upstream
Released (5.13)
linux-gcp-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-1052.56~18.04.1)
focal Does not exist

hirsute Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-gcp-5.3)
focal Does not exist

hirsute Does not exist

linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Ignored
(reached end of standard support)
groovy Does not exist

impish Does not exist

focal
Released (5.4.0-1052.55)
jammy Not vulnerable
(5.15.0-1002.2)
bionic Does not exist

hirsute Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
linux-gke-5.0
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
linux-gke-5.3
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic Ignored
(was needed now end-of-life)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

bionic
Released (5.4.0-1052.55~18.04.1)
jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-gkeop
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

focal
Released (5.4.0-1023.24)
bionic Does not exist

hirsute Does not exist

jammy Needs triage

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

bionic
Released (5.4.0-1023.24~18.04.1)
jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1100.102)
upstream
Released (5.13)
trusty Does not exist

xenial Not vulnerable
(4.4.0-1004.9)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1001.1)
focal
Released (5.4.0-1046.48)
hirsute
Released (5.11.0-1015.16)
jammy Not vulnerable
(5.13.0-1004.4)
linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
xenial Does not exist

groovy Does not exist

impish Does not exist

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
jammy Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

linux-oem
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
groovy Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

jammy Does not exist

bionic Ignored
(was needs-triage now end-of-life)
linux-oem-osp1
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1081.89)
upstream
Released (5.13)
trusty Does not exist

xenial
Released (4.15.0-1081.89~16.04.1)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1008.10)
focal
Released (5.4.0-1054.58)
hirsute
Released (5.11.0-1017.18)
jammy Not vulnerable
(5.13.0-1008.10)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

hirsute Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-oracle-5.4)
focal Does not exist

hirsute Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

bionic
Released (5.4.0-1054.58~18.04.1)
jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
focal
Released (5.4.0-1043.47)
trusty Does not exist

xenial Does not exist

groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1006.7)
hirsute
Released (5.11.0-1017.18)
jammy Not vulnerable
(5.13.0-1008.9)
bionic Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic
Released (5.4.0-1043.47~18.04.1)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1096.102)
upstream
Released (5.13)
trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
groovy Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(replaced by linux-raspi)
hirsute Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic Ignored
(was needed now end-of-life)
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
hirsute
Released (5.11.0-1018.19)
trusty Does not exist

xenial Does not exist

groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-1002.2)
jammy Not vulnerable
(5.13.0-1004.4)
bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1113.122)
upstream
Released (5.13)
trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
groovy Does not exist

impish Does not exist

jammy Does not exist

focal Does not exist

hirsute Does not exist

linux-hwe-5.11
Launchpad, Ubuntu, Debian
upstream
Released (5.13)
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal
Released (5.11.0-34.36~20.04.1)
jammy Does not exist

linux-riscv-5.11
Launchpad, Ubuntu, Debian
focal
Released (5.11.0-1018.19~20.04.2)
upstream
Released (5.13)
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

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

hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

impish Does not exist

focal
Released (5.4.0-1019.22)
jammy Does not exist

linux-oem-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.13.0-1009.10)
hirsute Does not exist

upstream
Released (5.13)
trusty Does not exist

xenial Does not exist

impish Does not exist

jammy Does not exist

linux-aws-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal
Released (5.11.0-1017.18~20.04.1)
upstream
Released (5.13)
jammy Does not exist

linux-azure-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal
Released (5.11.0-1015.16~20.04.1)
upstream
Released (5.13)
jammy Does not exist

linux-oracle-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

impish Does not exist

focal
Released (5.11.0-1017.18~20.04.1)
upstream
Released (5.13)
jammy Does not exist

linux
Launchpad, Ubuntu, Debian
xenial Not vulnerable
(4.4.0-2.16)
groovy Ignored
(reached end-of-life)
impish Not vulnerable
(5.13.0-14.14)
trusty Not vulnerable
(3.11.0-12.19)
jammy Not vulnerable
(5.13.0-19.19)
bionic
Released (4.15.0-159.167)
focal
Released (5.4.0-84.94)
hirsute
Released (5.11.0-34.36)
upstream
Released (5.13)
Patches:
Introduced by

add6a0cd1c5ba51b201e1361b05a5df817083618

Fixed by f8be156be163a052a067306417cd0ff679068c97
linux-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial
Released (4.15.0-159.167~16.04.1)
groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

upstream
Released (5.13)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-84.94~18.04.1)
focal Does not exist

hirsute Does not exist

upstream
Released (5.13)
linux-hwe-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Does not exist

focal Ignored
(was pending [5.8.0-67.75] now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

hirsute Does not exist

upstream
Released (5.13)
linux-oem-5.6
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
hirsute Does not exist

upstream
Released (5.13)
linux-oem-5.10
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

groovy Does not exist

impish Does not exist

jammy Does not exist

bionic Does not exist

focal
Released (5.10.0-1049.51)
hirsute Does not exist

upstream
Released (5.13)
linux-ibm
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal
Released (5.4.0-1004.5)
upstream
Released (5.13)
jammy Not vulnerable
(5.15.0-1002.2)
linux-gcp-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal
Released (5.11.0-1018.20~20.04.2)
upstream
Released (5.13)
jammy Does not exist

linux-oem-5.14
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.14.0-1004.4)
hirsute Does not exist

impish Does not exist

upstream
Released (5.13)
jammy Does not exist

linux-intel-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1007.7)
hirsute Does not exist

impish Does not exist

upstream
Released (5.13)
jammy Does not exist

linux-azure-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1009.10~20.04.2)
upstream
Released (5.13)
jammy Does not exist

linux-hwe-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-21.21~20.04.1)
upstream
Released (5.13)
jammy Does not exist

linux-aws-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.2)
upstream
Released (5.13)
jammy Does not exist

linux-fips
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.13)
xenial Not vulnerable
(4.4.0-1074.80)
jammy Does not exist

linux-oracle-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1011.13~20.04.2)
upstream
Released (5.13)
jammy Does not exist

linux-gcp-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.3)
impish Does not exist

upstream
Released (5.13)
jammy Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1010.11~18.04.2)
upstream
Released (5.13)
jammy Does not exist

linux-azure-fde
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1063.66+cvm2.2)
upstream
Released (5.13)
jammy Needs triage

linux-lowlatency
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-22.22)
upstream
Released (5.13)
linux-oem-5.17
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.17.0-1003.3)
upstream
Released (5.13)
linux-intel-iotg
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable

upstream Needs triage

linux-intel-iotg-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

impish Does not exist

jammy Does not exist

upstream Needs triage

linux-lowlatency-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-aws-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

upstream Needs triage

focal Not vulnerable

linux-gcp-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-gke-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage

linux-azure-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable

jammy Does not exist

upstream Needs triage