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CVE-2020-15393

Published: 29 June 2020

In the Linux kernel 4.4 through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak, aka CID-28ebeb8db770.

From the Ubuntu Security Team

Kyungtae Kim discovered that the USB testing driver in the Linux kernel did not properly deallocate memory on disconnect events. A physically proximate attacker could use this to cause a denial of service (memory exhaustion).

Priority

Low

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
upstream
Released (5.8~rc3)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1001.1)
upstream
Released (5.8~rc3)
focal Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

linux-hwe-5.8
Launchpad, Ubuntu, Debian
focal Not vulnerable
(5.8.0-23.24~20.04.1)
upstream
Released (5.8~rc3)
bionic Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support, was needed)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

groovy Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(4.15.0-1005.8)
upstream
Released (5.8~rc3)
linux-gkeop
Launchpad, Ubuntu, Debian
bionic Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.4.0-1008.9)
upstream
Released (5.8~rc3)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

groovy Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.10.0-1008.9)
upstream
Released (5.8~rc3)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1080.84)
eoan Ignored
(end of life)
groovy Not vulnerable
(5.8.0-1004.4)
trusty
Released (4.4.0-1076.80)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.8~rc3)
xenial
Released (4.4.0-1112.124)
focal
Released (5.4.0-1022.22)
linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1094.104)
eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Ignored
(end of standard support, was needs-triage)
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-115.116)
eoan Ignored
(end of life)
focal
Released (5.4.0-45.49)
groovy Not vulnerable
(5.8.0-16.17)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.8~rc3)
xenial
Released (4.4.0-187.217)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 28ebeb8db77035e058a510ce9bd17c2b9a009dba
linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-65.59)
trusty Does not exist

upstream
Released (5.8~rc3)
eoan Does not exist

focal Does not exist

groovy Does not exist

xenial
Released (4.15.0-115.116~16.04.1)
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~rc3)
xenial Does not exist

groovy Does not exist

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

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Ignored
(end of life, was needs-triage)
linux-kvm
Launchpad, Ubuntu, Debian
eoan Ignored
(end of life)
groovy Not vulnerable
(5.8.0-1001.1)
trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.4.0-1078.85)
bionic
Released (4.15.0-1072.73)
focal
Released (5.4.0-1021.21)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty
Released (4.4.0-187.217~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.8~rc3)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1033.35)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1022.22~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.15.0-1080.84~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan Ignored
(end of life)
focal
Released (5.4.0-1023.23)
groovy Not vulnerable
(5.8.0-1004.4)
trusty
Released (4.15.0-1093.103~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.8~rc3)
xenial
Released (4.15.0-1093.103~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1093.103)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1035.36)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan Ignored
(end of life)
focal
Released (5.4.0-1022.22)
groovy Not vulnerable
(5.8.0-1002.2)
trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.15.0-1081.92~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1081.92)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needed)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1033.35)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-45.49~18.04.2)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.6.0-1031.32)
groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support, was needed)
eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1051.55)
eoan Ignored
(end of life)
focal
Released (5.4.0-1022.22)
groovy Not vulnerable
(5.8.0-1001.1)
trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.15.0-1051.55~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needed)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
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

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-1016.17)
groovy Not vulnerable
(5.4.0-1016.17)
trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1016.17~18.04.1)
focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1068.72)
eoan Ignored
(end of life)
focal Ignored
(end of life, was needs-triage)
groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.4.0-1137.146)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1032.34)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-31.35)
groovy Not vulnerable
(5.8.0-1.1)
trusty Does not exist

upstream
Released (5.8~rc3)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1084.92)
eoan Does not exist

focal Does not exist

groovy Does not exist

trusty Does not exist

upstream
Released (5.8~rc3)
xenial
Released (4.4.0-1141.149)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H