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CVE-2021-3753

Published: 2 September 2021

A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

From the Ubuntu security team

It was discovered that the virtual terminal (vt) device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information.

Priority

Medium

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.13.0-19.19)
trusty Ignored
(was needed ESM criteria)
xenial Ignored
(was needed ESM criteria)
bionic
Released (4.15.0-162.170)
upstream
Released (5.15~rc1)
hirsute
Released (5.11.0-38.42)
focal
Released (5.4.0-90.101)
jammy Not vulnerable
(5.13.0-19.19)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 2287a51ba822384834dafc1c798453375d1107c7
linux-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

impish Does not exist

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

hirsute Does not exist

xenial
Released (4.15.0-162.170~16.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-90.101~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal Ignored
(was needed now end-of-life)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-hwe-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

focal
Released (5.11.0-38.42~20.04.1)
hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

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(superseded by linux-hwe)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

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(superseded by linux-hwe-5.4)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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

impish Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

trusty Ignored
(was needed ESM criteria)
upstream
Released (5.15~rc1)
jammy Does not exist

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

impish Not vulnerable
(5.13.0-1003.3)
xenial Ignored
(was needed ESM criteria)
bionic
Released (4.15.0-1102.104)
focal
Released (5.4.0-1049.51)
hirsute
Released (5.11.0-1018.19)
upstream
Released (5.15~rc1)
jammy Not vulnerable
(5.13.0-1004.4)
linux-aws
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.13.0-1005.6)
trusty Ignored
(was needed ESM criteria)
xenial Ignored
(was needed ESM criteria)
bionic
Released (4.15.0-1115.122)
focal
Released (5.4.0-1059.62)
hirsute
Released (5.11.0-1020.21)
upstream
Released (5.15~rc1)
jammy Not vulnerable
(5.13.0-1005.6)
linux-aws-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
bionic
Released (5.4.0-1059.62~18.04.1)
jammy Does not exist

linux-aws-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

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

upstream
Released (5.15~rc1)
jammy Does not exist

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

impish Does not exist

bionic Does not exist

focal Does not exist

hirsute Does not exist

xenial
Released (4.15.0-1115.122~16.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-azure
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.13.0-1006.7)
bionic Ignored
(superseded by linux-azure-5.3)
trusty
Released (4.15.0-1126.139~14.04.1)
xenial
Released (4.15.0-1126.139~16.04.1)
focal
Released (5.4.0-1063.66)
upstream
Released (5.15~rc1)
hirsute
Released (5.11.0-1020.21)
jammy Not vulnerable
(5.13.0-1006.7)
linux-azure-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (4.15.0-1126.139)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1063.66~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

focal Ignored
(was needed now end-of-life)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-bluefield
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 (5.4.0-1021.24)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (4.15.0-1030.35)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

impish Not vulnerable
(5.13.0-1005.6)
bionic Ignored
(superseded by linux-gcp-5.3)
xenial
Released (4.15.0-1111.125~16.04.1)
focal
Released (5.4.0-1057.61)
upstream
Released (5.15~rc1)
hirsute
Released (5.11.0-1021.23)
jammy Not vulnerable
(5.13.0-1005.6)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (4.15.0-1111.125)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1057.61~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

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

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

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

bionic Does not exist

hirsute Does not exist

focal
Released (5.4.0-1055.58)
upstream
Released (5.15~rc1)
jammy Not vulnerable
(5.15.0-1002.2)
linux-gke-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1055.58~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-gkeop
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 (5.4.0-1026.27)
upstream
Released (5.15~rc1)
jammy Needs triage

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1026.27~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

impish Not vulnerable
(5.13.0-1008.10)
xenial
Released (4.15.0-1083.91~16.04.1)
bionic
Released (4.15.0-1083.91)
focal
Released (5.4.0-1057.61)
upstream
Released (5.15~rc1)
hirsute
Released (5.11.0-1020.21)
jammy Not vulnerable
(5.13.0-1008.10)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic
Released (5.4.0-1057.61~18.04.1)
focal Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

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

upstream
Released (5.15~rc1)
jammy Does not exist

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

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

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

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

upstream
Released (5.15~rc1)
jammy Does not exist

linux-oem-5.10
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
focal
Released (5.10.0-1050.52)
jammy Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Not vulnerable
(5.13.0-1008.9)
bionic Does not exist

focal
Released (5.4.0-1046.50)
hirsute
Released (5.11.0-1021.22)
upstream
Released (5.15~rc1)
jammy Not vulnerable
(5.13.0-1008.9)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

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

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

bionic
Released (4.15.0-1098.104)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

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

hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

focal Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1046.50~18.04.1)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Not vulnerable
(5.13.0-1004.4)
bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.8)
upstream
Released (5.15~rc1)
hirsute
Released (5.11.0-1021.22)
jammy Not vulnerable
(5.13.0-1004.4)
linux-riscv-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

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

upstream
Released (5.15~rc1)
jammy Does not exist

linux-riscv-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
focal
Released (5.11.0-1021.22~20.04.1)
jammy Does not exist

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

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

focal Does not exist

hirsute Does not exist

bionic
Released (4.15.0-1115.124)
upstream
Released (5.15~rc1)
jammy Does not exist

linux-aws-5.11
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 (5.11.0-1020.21~20.04.2)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
focal
Released (5.11.0-1020.21~20.04.1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.15~rc1)
focal
Released (5.11.0-1020.21~20.04.1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

focal
Released (5.13.0-1017.21)
hirsute Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

impish Does not exist

bionic Does not exist

focal
Released (5.4.0-1007.8)
hirsute Does not exist

upstream
Released (5.15~rc1)
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

focal
Released (5.11.0-1021.23~20.04.1)
hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.14.0-1004.4)
upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc1)
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 (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-21.21~20.04.1)
impish Does not exist

upstream
Released (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.2)
impish Does not exist

upstream
Released (5.15~rc1)
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 (5.15~rc1)
xenial Ignored
(was needed ESM criteria)
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 (5.15~rc1)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.3)
upstream
Released (5.15~rc1)
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 (5.15~rc1)
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 Needed

upstream
Released (5.15~rc1)
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 (5.15~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 (5.15~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

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