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CVE-2022-21499

Published: 24 May 2022

KGDB and KDB allow read and write access to kernel memory, and thus should be restricted during lockdown. An attacker with access to a serial port could trigger the debugger so it is important that the debugger respect the lockdown mode when/if it is triggered. CVSS 3.1 Base Score 6.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H).

From the Ubuntu security team

It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions.

Priority

High

CVSS 3 base score: 6.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-184.194)
focal
Released (5.4.0-117.132)
impish
Released (5.13.0-48.54)
jammy
Released (5.15.0-37.39)
trusty
Released (3.13.0-190.241)
upstream Pending

xenial
Released (4.4.0-227.261)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1133.143)
focal
Released (5.4.0-1078.84)
impish
Released (5.13.0-1028.31)
jammy
Released (5.15.0-1011.14)
trusty
Released (4.4.0-1107.113)
upstream Pending

xenial
Released (4.4.0-1143.158)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-1028.31~20.04.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1078.84~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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(superseded by linux-aws-5.11)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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial
Released (4.15.0-1133.143~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal
Released (5.4.0-1083.87)
impish
Released (5.13.0-1028.33)
jammy
Released (5.15.0-1010.12)
trusty
Released (4.15.0-1142.156~14.04.1)
upstream Pending

xenial
Released (4.15.0-1142.156~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1142.156)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-1028.33~20.04.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1083.87~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.4.0-1083.87+cvm1.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal Needed

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Needed

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal
Released (5.4.0-1078.84)
impish
Released (5.13.0-1030.36)
jammy
Released (5.15.0-1008.12)
trusty Does not exist

upstream Pending

xenial
Released (4.15.0-1127.142~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-1030.36~20.04.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.4.0-1074.79)
impish Does not exist

jammy
Released (5.15.0-1008.10)
trusty Does not exist

upstream Pending

xenial Ignored
(reached end of standard support)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gke-5.3)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gke-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1074.79~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.4.0-1046.48)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1046.48~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial
Released (4.15.0-184.194~16.04.1)
linux-hwe-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-48.54~20.04.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-117.132~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-hwe-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Ignored
(superseded by linux-hwe)
linux-ibm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.4.0-1026.29)
impish Does not exist

jammy
Released (5.15.0-1007.8)
trusty Does not exist

upstream Pending

xenial Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1026.29~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-1014.15)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-intel-iotg
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

impish Does not exist

jammy
Released (5.15.0-1008.11)
trusty Does not exist

upstream Needs triage

xenial Does not exist

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

focal Needed

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1119.123)
focal
Released (5.4.0-1068.72)
impish
Released (5.13.0-1027.29)
jammy
Released (5.15.0-1010.11)
trusty Does not exist

upstream Pending

xenial
Released (4.4.0-1108.118)
linux-lowlatency
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

impish Does not exist

jammy
Released (5.15.0-37.39)
trusty Does not exist

upstream Pending

xenial Does not exist

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

focal Does not exist

impish Does not exist

jammy Does not exist

trusty
Released (4.4.0-227.261~14.04.1)
upstream Pending

xenial Does not exist

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

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Ignored
(superseded by linux-hwe)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.14.0-1042.47)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-oem-5.17
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

impish Does not exist

jammy
Released (5.17.0-1011.12)
trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1098.108)
focal
Released (5.4.0-1076.83)
impish
Released (5.13.0-1033.39)
jammy
Released (5.15.0-1009.12)
trusty Does not exist

upstream Pending

xenial
Released (4.15.0-1098.108~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.13.0-1033.39~20.04.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1076.83~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal
Released (5.4.0-1065.75)
impish
Released (5.13.0-1031.34)
jammy
Released (5.15.0-1011.13)
trusty Does not exist

upstream Pending

xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1065.75~18.04.1)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1114.122)
focal Ignored
(replaced by linux-raspi)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Ignored
(end of standard support)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-raspi-5.4)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

focal Ignored
(superseded by linux-riscv-5.8)
impish Needed

jammy Needed

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1132.142)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Pending

xenial Ignored
(end of standard support)