CVE-2020-13974
Published: 9 June 2020
An issue was discovered in the Linux kernel 4.4 through 5.7.1. drivers/tty/vt/keyboard.c has an integer overflow if k_ascii is called several times in a row, aka CID-b86dab054059. NOTE: Members in the community argue that the integer overflow does not lead to a security issue in this case.
From the Ubuntu Security Team
It was discovered that the Virtual Terminal keyboard driver in the Linux kernel contained an integer overflow. A local attacker could possibly use this to have an unspecified impact.
Notes
| Author | Note |
|---|---|
| sbeattie | reproducer in lore.kernel.org link |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
focal |
Released
(5.6.0-1018.18)
|
| bionic |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
focal |
Ignored
(end of life, was needs-triage)
|
| eoan |
Ignored
(end of life, was pending)
|
|
| bionic |
Released
(4.15.0-1068.72)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1136.145)
|
|
|
linux-aws Launchpad, Ubuntu, Debian |
eoan |
Ignored
(end of life, was pending)
|
| bionic |
Released
(4.15.0-1080.84)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| trusty |
Released
(4.4.0-1075.79)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1111.123)
|
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.2)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
eoan |
Ignored
(end of life, was pending)
|
| bionic |
Ignored
(end of life, was needs-triage)
|
|
| focal |
Released
(5.4.0-1023.23)
|
|
| trusty |
Released
(4.15.0-1093.103~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1093.103~16.04.1)
|
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1034.35~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
eoan |
Ignored
(end of life, was pending)
|
| bionic |
Ignored
(end of life, was needs-triage)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1081.92~16.04.1)
|
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1045.46)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-64.58~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-115.116~16.04.1)
|
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.8~rc1)
|
| bionic |
Released
(5.4.0-45.49~18.04.2)
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
eoan |
Ignored
(end of life, was pending)
|
| bionic |
Released
(4.15.0-1072.73)
|
|
| focal |
Released
(5.4.0-1021.21)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1077.84)
|
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1065.70)
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
eoan |
Ignored
(end of life, was pending)
|
| bionic |
Released
(4.15.0-1051.55)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1051.55~16.04.1)
|
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
upstream |
Released
(5.8~rc1)
|
| bionic |
Released
(5.4.0-1016.17~18.04.1)
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.2)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-riscv Launchpad, Ubuntu, Debian |
focal |
Released
(5.4.0-31.35)
|
| bionic |
Does not exist
|
|
| eoan |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-115.116)
|
| eoan |
Ignored
(end of life, was pending)
|
|
| focal |
Released
(5.4.0-45.49)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-186.216)
|
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Ignored
(end of life, was needs-triage)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Released
(4.4.0-186.216~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
focal |
Does not exist
|
| bionic |
Released
(5.4.0-1022.22~18.04.1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1080.84~16.04.1)
|
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1093.103)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1023.23~18.04.1)
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1081.92)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1067.70)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1094.104)
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of life, was needs-triage)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Released
(5.4.0-1016.17)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1084.92)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1140.148)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13974
- https://git.kernel.org/linus/b86dab054059b970111b5516ae548efaae5b3aae
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b86dab054059b970111b5516ae548efaae5b3aae
- https://lkml.org/lkml/2020/3/22/482
- https://lore.kernel.org/lkml/CAEAjams79+V8bxpcp3UAsU1AnJ+gx2y+ZqhDhjJCpZn2oeZA4Q@mail.gmail.com/
- https://ubuntu.com/security/notices/USN-4427-1
- https://ubuntu.com/security/notices/USN-4439-1
- https://ubuntu.com/security/notices/USN-4440-1
- https://ubuntu.com/security/notices/USN-4483-1
- https://ubuntu.com/security/notices/USN-4485-1
- NVD
- Launchpad
- Debian