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CVE-2020-14331

Published: 15 September 2020

A flaw was found in the Linux kernel’s implementation of the invert video code on VGA consoles when a local attacker attempts to resize the console, calling an ioctl VT_RESIZE, which causes an out-of-bounds write to occur. This flaw allows a local user with access to the VGA console to crash the system, potentially escalating their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Priority

Negligible

CVSS 3 base score: 6.6

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Not vulnerable
(config not enabled)
precise Ignored
(was not-affected [config not enabled])
trusty Ignored
(was not-affected [config not enabled])
upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Ignored
(was not-affected [config not enabled])
upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(was not-affected [config not enabled])
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Ignored
(was not-affected [config not enabled])
upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(was not-affected [config not enabled])
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1008.9~18.04.1)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

precise Ignored
(was not-affected [config not enabled])
trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

focal Does not exist

precise Does not exist

trusty Ignored
(was not-affected [config not enabled])
upstream
Released (5.9~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Ignored
(was needs-triage now end-of-life)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

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

focal Not vulnerable
(config not enabled)
precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(config not enabled)
focal Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.9~rc1)
xenial Not vulnerable
(config not enabled)

Notes

AuthorNote
amurray
CONFIG_VGACON_SOFT_SCROLLBACK is required to be enabled for this to be exploitable. This config option is disabled in Ubuntu kernel configs.

References

Bugs