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CVE-2021-33656

Published: 18 July 2022

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

From the Ubuntu security team

It was discovered that the virtual terminal driver in the Linux kernel did not properly handle VGA console font changes, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Medium

CVSS 3 base score: 6.8

Status

Package Release Status
linux-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
xenial
Released (4.15.0-192.203~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-125.141~18.04.1)
upstream
Released (5.12~rc1)
linux-hwe-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-hwe-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-hwe-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-hwe-5.13)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-hwe-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
trusty Does not exist

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(superseded by linux-hwe)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(superseded by linux-hwe-5.4)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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

trusty
Released (4.4.0-234.268~14.04.1)
upstream
Released (5.12~rc1)
linux-kvm
Launchpad, Ubuntu, Debian
trusty Does not exist

impish Ignored
(reached end-of-life)
bionic
Released (4.15.0-1126.131)
jammy Not vulnerable
(5.13.0-1004.4)
upstream
Released (5.12~rc1)
xenial
Released (4.4.0-1114.124)
focal
Released (5.4.0-1074.79)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1140.151)
focal
Released (5.4.0-1084.91)
impish Ignored
(reached end-of-life)
jammy Not vulnerable
(5.13.0-1005.6)
trusty
Released (4.4.0-1113.119)
upstream
Released (5.12~rc1)
xenial
Released (4.4.0-1151.166)
linux-aws-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-aws-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-aws-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-1084.91~18.04.1)
upstream
Released (5.12~rc1)
linux-aws-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-aws-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-aws-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-aws-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-aws-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
xenial
Released (4.15.0-1140.151~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
impish Ignored
(reached end-of-life)
focal
Released (5.4.0-1090.95)
jammy Not vulnerable
(5.13.0-1006.7)
trusty
Released (4.15.0-1150.165~14.04.1)
upstream
Released (5.12~rc1)
xenial
Released (4.15.0-1150.165~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (4.15.0-1150.165)
upstream
Released (5.12~rc1)
linux-azure-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-azure-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-1090.95~18.04.1)
upstream
Released (5.12~rc1)
linux-azure-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-azure-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-azure-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-azure-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-azure-fde
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal
Released (5.4.0-1090.95+cvm1.1)
impish Does not exist

jammy Not vulnerable
(5.13.0-1006.7)
upstream
Released (5.12~rc1)
linux-bluefield
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Not vulnerable

focal
Released (5.4.0-1045.50)
upstream
Released (5.12~rc1)
linux-dell300x
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (4.15.0-1052.57)
upstream
Released (5.12~rc1)
linux-azure-edge
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
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

jammy Does not exist

upstream
Released (5.12~rc1)
xenial Ignored
(was needed ESM criteria)
linux-gcp
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Ignored
(superseded by linux-gcp-5.3)
focal
Released (5.4.0-1087.95)
impish Ignored
(reached end-of-life)
jammy Not vulnerable
(5.13.0-1005.6)
upstream
Released (5.12~rc1)
xenial
Released (4.15.0-1135.151~16.04.2)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
bionic
Released (4.15.0-1135.151)
linux-gcp-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-gcp-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-1087.95~18.04.1)
upstream
Released (5.12~rc1)
linux-gcp-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-gcp-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-gcp-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-gcp-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

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

jammy Does not exist

upstream
Released (5.12~rc1)
linux-gke
Launchpad, Ubuntu, Debian
trusty Does not exist

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

impish Does not exist

focal
Released (5.4.0-1081.87)
jammy Not vulnerable
(5.15.0-1002.2)
upstream
Released (5.12~rc1)
linux-gke-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-gke-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-gke-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-gke-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
bionic Ignored
(was needed now end-of-life)
linux-gkeop
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-1001.2)
upstream
Released (5.12~rc1)
focal
Released (5.4.0-1052.55)
linux-gkeop-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
bionic Ignored
(was needed now end-of-life)
linux-ibm
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal
Released (5.4.0-1032.36)
jammy Not vulnerable
(5.15.0-1002.2)
upstream
Released (5.12~rc1)
linux-ibm-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic
Released (5.4.0-1032.36~18.04.1)
upstream
Released (5.12~rc1)
linux-intel-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
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
(5.15.0-1004.6)
upstream
Released (5.12~rc1)
linux-intel-iotg-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Not vulnerable
(5.15.0-1003.5~20.04.1)
upstream
Released (5.12~rc1)
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 (5.12~rc1)
linux-oracle
Launchpad, Ubuntu, Debian
trusty Does not exist

impish Ignored
(reached end-of-life)
bionic
Released (4.15.0-1105.116)
jammy Not vulnerable
(5.13.0-1008.10)
upstream
Released (5.12~rc1)
xenial
Released (4.15.0-1105.116~16.04.1)
focal
Released (5.4.0-1082.90)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-oracle-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-oracle-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
bionic
Released (5.4.0-1082.90~18.04.1)
linux-oracle-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-oracle-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-oracle-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-oracle-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-oem
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-oem-5.6
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-oem-5.10
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-oem-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-oem-5.14
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Not vulnerable
(5.14.0-1004.4)
upstream
Released (5.12~rc1)
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 (5.12~rc1)
linux-oem-osp1
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

jammy Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-raspi
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Ignored
(reached end-of-life)
jammy Not vulnerable
(5.13.0-1008.9)
upstream
Released (5.12~rc1)
focal
Released (5.4.0-1069.79)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Ignored
(end of standard support)
focal Ignored
(replaced by linux-raspi)
impish Does not exist

jammy Does not exist

bionic
Released (4.15.0-1118.126)
upstream
Released (5.12~rc1)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-raspi-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic
Released (5.4.0-1069.79~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-riscv
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.8)
impish Ignored
(reached end-of-life)
jammy Not vulnerable
(5.13.0-1004.4)
upstream
Released (5.12~rc1)
linux-riscv-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.11)
impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
linux-riscv-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

jammy Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Ignored
(end of standard support)
focal Does not exist

impish Does not exist

jammy Does not exist

upstream
Released (5.12~rc1)
bionic
Released (4.15.0-1136.146)
linux
Launchpad, Ubuntu, Debian
impish Ignored
(reached end-of-life)
bionic
Released (4.15.0-192.203)
focal
Released (5.4.0-125.141)
jammy Not vulnerable
(5.13.0-19.19)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.12~rc1)
xenial
Released (4.4.0-234.268)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by ff2047fb755d4415ec3c70ac799889371151796d
linux-lowlatency-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.15.0-33.34~20.04.1)
jammy Does not exist

upstream
Released (5.12~rc1)
linux-hwe-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.15.0-33.34~20.04.1)
jammy Does not exist

upstream
Released (5.12~rc1)
linux-aws-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

focal Not vulnerable
(5.15.0-1014.18~20.04.1)
upstream
Released (5.12~rc1)
linux-gcp-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

focal Not vulnerable
(5.15.0-1006.9~20.04.1)
upstream
Released (5.12~rc1)
linux-gke-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

focal Not vulnerable
(5.15.0-1011.14~20.04.1)
upstream
Released (5.12~rc1)
linux-azure-5.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

jammy Does not exist

focal Not vulnerable
(5.15.0-1007.8~20.04.1)
upstream
Released (5.12~rc1)