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CVE-2020-12464

Published: 29 April 2020

usb_sg_cancel in drivers/usb/core/message.c in the Linux kernel before 5.6.8 has a use-after-free because a transfer occurs without a reference, aka CID-056ad39ee925.

From the Ubuntu Security Team

It was discovered that the USB susbsystem's scatter-gather implementation in the Linux kernel did not properly take data references in some situations, leading to a use-after-free. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

Medium

Cvss 3 Severity Score

6.7

Score breakdown

Status

Package Release Status
linux-raspi-5.4
Launchpad, Ubuntu, Debian
upstream
Released (5.7~rc3)
bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

trusty Does not exist

xenial Does not exist

linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-106.107)
eoan
Released (5.3.0-59.53)
focal
Released (5.4.0-37.41)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.7~rc3)
xenial
Released (4.4.0-184.214)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 056ad39ee9253873522f6469c3364964a322912b
linux-aws
Launchpad, Ubuntu, Debian
trusty
Released (4.4.0-1073.77)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.7~rc3)
bionic
Released (4.15.0-1073.77)
eoan
Released (5.3.0-1023.25)
focal
Released (5.4.0-1015.15)
xenial
Released (4.4.0-1109.120)
linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-59.53~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.15.0-106.107~16.04.1)
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 (5.7~rc3)
xenial Ignored
(end of life, was needs-triage)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1067.68)
eoan
Released (5.3.0-1023.25)
focal
Released (5.4.0-1015.15)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.4.0-1075.82)
linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1023.25~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
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 (5.7~rc3)
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 (5.7~rc3)
xenial
Released (4.15.0-1073.77~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan
Released (5.3.0-1028.29)
focal
Released (5.4.0-1016.16)
trusty
Released (4.15.0-1089.99~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.7~rc3)
xenial
Released (4.15.0-1089.99~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1089.99)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1028.29~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~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

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan
Released (5.3.0-1026.28)
focal
Released (5.4.0-1015.15)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.15.0-1077.87~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1077.87)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1026.28~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~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

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1063.66)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1042.43)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1026.28~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-37.41~18.04.1)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

trusty
Released (4.4.0-184.214~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.7~rc3)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1087.97)
eoan Ignored
(end of life)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Ignored
(end of standard support, was needs-triage)
linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

eoan Does not exist

focal
Released (5.6.0-1010.10)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1059.64)
eoan Ignored
(end of life)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1045.49)
eoan
Released (5.3.0-1024.26)
focal
Released (5.4.0-1015.15)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.15.0-1045.49~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1024.26~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-1012.12)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1063.67)
eoan
Released (5.3.0-1027.29)
focal Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.4.0-1134.143)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1027.29~18.04.1)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-27.31)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1080.87)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial
Released (4.4.0-1138.146)

Severity score breakdown

Parameter Value
Base score 6.7
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H