CVE-2019-19039
Published: 21 November 2019
** DISPUTED ** __btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.”
From the Ubuntu Security Team
It was discovered that the btrfs file system in the Linux kernel in some error conditions could report register information to the dmesg buffer. A local attacker could possibly use this to expose sensitive information.
Notes
Author | Note |
---|---|
tyhicks | Exploiting this vulnerability requires a crafted filesystem image to be mounted |
Mitigation
| sudo sysctl kernel.dmesg_restrict=1
Priority
Status
Package | Release | Status |
---|---|---|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
hirsute |
Does not exist
|
bionic |
Released
(5.3.0-1019.21~18.04.1)
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe-5.8 Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
focal |
Not vulnerable
(5.8.0-23.24~20.04.1)
|
|
upstream |
Released
(5.7~rc1)
|
|
linux-gke-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
(5.4.0-1025.25~18.04.1)
|
|
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)
|
|
upstream |
Released
(5.7~rc1)
|
|
linux-azure Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(5.8.0-1016.17+21.04.1)
|
groovy |
Not vulnerable
(5.4.0-1022.22)
|
|
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)
|
|
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-gcp Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(5.8.0-1015.15+21.04.1)
|
groovy |
Not vulnerable
(5.4.0-1021.21)
|
|
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)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1080.90~16.04.1)
|
|
linux Launchpad, Ubuntu, Debian |
hirsute |
Not vulnerable
(5.8.0-36.40+21.04.1)
|
groovy |
Not vulnerable
(5.4.0-42.46)
|
|
xenial |
Ignored
(end of life, was needed)
|
|
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)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 |
||
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-dell300x Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(4.15.0-1005.8)
|
upstream |
Released
(5.7~rc1)
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-gkeop Launchpad, Ubuntu, Debian |
focal |
Not vulnerable
(5.4.0-1008.9)
|
bionic |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-hwe Launchpad, Ubuntu, Debian |
xenial |
Released
(4.15.0-112.113~16.04.1)
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
linux-aws Launchpad, Ubuntu, Debian |
groovy |
Not vulnerable
(5.4.0-1020.20)
|
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)
|
|
hirsute |
Not vulnerable
(5.8.0-1018.20+21.04.1)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
linux-oracle Launchpad, Ubuntu, Debian |
groovy |
Not vulnerable
(5.4.0-1021.21)
|
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)
|
|
hirsute |
Not vulnerable
(5.8.0-1014.14+21.04.1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1050.54~16.04.1)
|
|
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
|
|
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
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Released
(4.15.0-1079.83~16.04.1)
|
|
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
|
|
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)
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
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
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
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
|
|
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
|
|
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
|
|
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
|
|
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
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
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
|
|
groovy |
Does not exist
|
|
hirsute |
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of life, was needs-triage)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
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)
|
|
hirsute |
Not vulnerable
(5.8.0-1010.11+21.04.1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of life, was needed)
|
|
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
|
|
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
|
|
trusty |
Ignored
(was needs-triage 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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
linux-oem-5.10 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Not vulnerable
(5.10.0-1008.9)
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
eoan |
Does not exist
|
|
focal |
Released
(5.6.0-1010.10)
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
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
|
|
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
|
|
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
|
|
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)
|
|
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
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
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
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
|
|
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)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
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
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |