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CVE-2019-19816

Published: 17 December 2019

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.

From the Ubuntu security team

It was discovered that the btrfs file system implementation in the Linux kernel did not properly validate file system metadata in some situations. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service (system crash).

Notes

AuthorNote
tyhicks
As of 2020-01-09, no upstream fix is available
sbeattie
upstream developer asserts in suse bug that the enhanced
btrfs tree-checker will address this issue, so would be fixed in
4.4.x and newer
Priority

Low

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-109.110)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.2.0-8.9)
focal Not vulnerable
(5.4.0-9.12)
groovy Not vulnerable
(5.4.0-26.30)
precise Ignored
(was needs-triage ESM criteria)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.2~rc1)
xenial
Released (4.4.0-201.233)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 6bf9e4bd6a277840d3fe8c5d5d530a1fbd3db592
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1077.81)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty
Released (4.4.0-1085.89)
upstream
Released (5.2~rc1)
xenial
Released (4.4.0-1121.135)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1016.17~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial
Released (4.15.0-1079.83~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1002.2)
focal Not vulnerable
(5.4.0-1006.6)
groovy Not vulnerable
(5.4.0-1010.10)
precise Does not exist

trusty
Released (4.15.0-1091.101~14.04.1)
upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1007.8~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1005.8)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1008.9~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needed now end-of-life)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

focal Not vulnerable
(5.4.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1001.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.3.0-26.28~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1069.70)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1004.4)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial
Released (4.4.0-1087.96)
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

precise Ignored
(was needs-triage ESM criteria)
trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty
Released (4.4.0-201.233~14.04.1)
upstream
Released (5.2~rc1)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Ignored
(was needs-triage now end-of-life)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.10.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Not vulnerable
(5.6.0-1007.7)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1048.52)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1002.2)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial
Released (4.15.0-1050.54~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Not vulnerable
(5.4.0-1007.7)
groovy Not vulnerable
(5.4.0-1008.8)
precise Does not exist

trusty Does not exist

upstream
Released (5.2~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

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1065.69)
disco Ignored
(reached end-of-life)
eoan Not vulnerable
(5.3.0-1005.6)
focal Ignored
(was needs-triage now end-of-life)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial
Released (4.4.0-1145.155)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

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

eoan Does not exist

focal Not vulnerable
(5.4.0-24.28)
groovy Not vulnerable
(5.4.0-24.28)
precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1083.91)
disco Ignored
(reached end-of-life)
eoan Does not exist

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.2~rc1)
xenial
Released (4.4.0-1149.159)