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CVE-2019-19377

Published: 29 November 2019

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.

From the Ubuntu Security Team

It was discovered that the btrfs implementation in the Linux kernel did not properly detect that a block was marked dirty in some situations. An attacker could use this to specially craft a file system image that, when unmounted, could cause a denial of service (system crash).

Notes

AuthorNote
tyhicks
Exploiting this vulnerability requires a crafted filesystem image to
be mounted

Priority

Low

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
linux-raspi2
Launchpad, Ubuntu, Debian
hirsute Does not exist

bionic
Released (4.15.0-1065.69)
disco Ignored
(end of life)
eoan
Released (5.3.0-1025.27)
focal Ignored
(end of life, was needs-triage)
groovy Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Ignored
(end of standard support, was needed)
linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support, was needed)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(5.8.0-1010.11+21.04.1)
xenial Ignored
(end of life, was needed)
bionic
Released (4.15.0-1069.70)
disco Ignored
(end of life)
eoan
Released (5.3.0-1017.19)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1015.15)
jammy Not vulnerable
(5.13.0-1004.4)
kinetic Not vulnerable
(5.15.0-1004.4)
lunar Not vulnerable
(5.19.0-1008.8)
trusty Does not exist

upstream
Released (5.7~rc1)
linux-hwe-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.8.0-23.24~20.04.1)
lunar Does not exist

upstream
Released (5.7~rc1)
linux-gke-5.4
Launchpad, Ubuntu, Debian
focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
lunar Does not exist

upstream
Released (5.7~rc1)
linux-gkeop-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic Not vulnerable
(5.4.0-1001.1)
lunar Does not exist

upstream
Released (5.7~rc1)
linux
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(5.8.0-36.40+21.04.1)
lunar Not vulnerable
(5.19.0-21.21)
bionic
Released (4.15.0-109.110)
disco Ignored
(end of life)
eoan
Released (5.3.0-53.47)
focal
Released (5.4.0-31.35)
groovy Not vulnerable
(5.4.0-42.46)
jammy Not vulnerable
(5.13.0-19.19)
kinetic Not vulnerable
(5.15.0-25.25)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.7~rc1)
xenial Ignored
(was needed ESM criteria)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by b3ff8f1d380e65dddd772542aa9bff6c86bf715a
linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support, was needed)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(4.15.0-1005.8)
upstream
Released (5.7~rc1)
lunar Does not exist

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

groovy Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.4.0-1008.9)
upstream
Released (5.7~rc1)
jammy Not vulnerable
(5.15.0-1001.2)
lunar Does not exist

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

groovy Does not exist

hirsute Does not exist

trusty Does not exist

xenial Does not exist

focal Not vulnerable
(5.10.0-1008.9)
upstream
Released (5.7~rc1)
lunar Does not exist

linux-aws
Launchpad, Ubuntu, Debian
xenial Ignored
(end of life, was needed)
bionic
Released (4.15.0-1077.81)
disco Ignored
(end of life)
eoan
Released (5.3.0-1019.21)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1020.20)
hirsute Not vulnerable
(5.8.0-1018.20+21.04.1)
jammy Not vulnerable
(5.13.0-1005.6)
kinetic Not vulnerable
(5.15.0-1004.6)
lunar Not vulnerable
(5.19.0-1009.9)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.7~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
xenial Ignored
(end of standard support, was needed)
bionic
Released (4.15.0-1083.91)
disco Ignored
(end of life)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
linux-oem-5.6
Launchpad, Ubuntu, Debian
groovy Does not exist

bionic Does not exist

eoan Does not exist

focal
Released (5.6.0-1010.10)
hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1019.21~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
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

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1079.83~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Ignored
(end of life)
eoan
Released (5.3.0-1022.23)
focal
Released (5.4.0-1012.12)
groovy Not vulnerable
(5.4.0-1022.22)
hirsute Not vulnerable
(5.8.0-1016.17+21.04.1)
jammy Not vulnerable
(5.13.0-1006.7)
kinetic Not vulnerable
(5.15.0-1003.4)
lunar Not vulnerable
(5.19.0-1008.8)
trusty
Released (4.15.0-1091.101~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1091.101~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1091.101)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1022.23~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
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

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Ignored
(end of life)
eoan
Released (5.3.0-1020.22)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1021.21)
hirsute Not vulnerable
(5.8.0-1015.15+21.04.1)
jammy Not vulnerable
(5.13.0-1005.6)
kinetic Not vulnerable
(5.15.0-1003.6)
lunar Not vulnerable
(5.19.0-1008.8)
trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1080.90~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1080.90)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1020.22~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
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

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1066.69)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1020.22~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-53.47~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-112.113~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-37.41~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Ignored
(end of life, was needs-triage)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Ignored
(was needed ESM criteria)
upstream
Released (5.7~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1091.101)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Ignored
(end of standard support, was needs-triage)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1048.52)
disco Ignored
(end of life)
eoan
Released (5.3.0-1018.20)
focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1021.21)
hirsute Not vulnerable
(5.8.0-1014.14+21.04.1)
jammy Not vulnerable
(5.13.0-1008.10)
kinetic Not vulnerable
(5.15.0-1002.4)
lunar Not vulnerable
(5.19.0-1008.8)
trusty Does not exist

upstream
Released (5.7~rc1)
xenial
Released (4.15.0-1050.54~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was needs-triage)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1018.20~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
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

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-1011.11)
groovy Not vulnerable
(5.4.0-1012.12)
hirsute Not vulnerable
(5.8.0-1008.11+21.04.1)
jammy Not vulnerable
(5.13.0-1008.9)
kinetic Not vulnerable
(5.15.0-1005.5)
lunar Not vulnerable
(5.19.0-1004.10)
trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-1026.28~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

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

eoan Does not exist

focal
Released (5.4.0-26.30)
groovy Not vulnerable
(5.4.0-27.31)
hirsute Not vulnerable
(5.8.0-10.12+21.04.1)
jammy Ignored
(end of life, was needs-triage)
kinetic Not vulnerable
(5.15.0-1007.7)
lunar Not vulnerable
(5.19.0-1004.4)
trusty Does not exist

upstream
Released (5.7~rc1)
xenial Does not exist

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H