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.
Mitigation
| sudo sysctl kernel.dmesg_restrict=1
CVSS 3 base score: 5.5
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-109.110)
|
disco |
Ignored
(reached 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)
|
|
hirsute |
Not vulnerable
(5.8.0-36.40+21.04.1)
|
|
precise |
Ignored
(was needs-triage ESM criteria)
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1077.81)
|
disco |
Ignored
(reached 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)
|
|
precise |
Does not exist
|
|
trusty |
Ignored
(was needs-triage ESM criteria)
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
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
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
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
|
|
precise |
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
|
|
precise |
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
(was needs-triage now end-of-life)
|
disco |
Ignored
(reached 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)
|
|
precise |
Does not exist
|
|
trusty |
Released
(4.15.0-1091.101~14.04.1)
|
|
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
|
|
precise |
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
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
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)
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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 |
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)
|
|
precise |
Does not exist
|
|
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
|
|
precise |
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
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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 |
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)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
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
|
|
precise |
Ignored
(was needs-triage ESM criteria)
|
|
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
|
|
precise |
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
(reached end-of-life)
|
|
eoan |
Ignored
(reached end-of-life)
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~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
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Does not exist
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1048.52)
|
disco |
Ignored
(reached 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)
|
|
precise |
Does not exist
|
|
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
(was needs-triage now end-of-life)
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
precise |
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
|
|
precise |
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
|
|
precise |
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)
|
|
precise |
Does not exist
|
|
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
|
|
precise |
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
(reached end-of-life)
|
|
eoan |
Released
(5.3.0-1025.27)
|
|
focal |
Ignored
(was needs-triage now end-of-life)
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
|
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
|
|
precise |
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)
|
|
precise |
Does not exist
|
|
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
(reached end-of-life)
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(5.7~rc1)
|
|
xenial |
Ignored
(was needed now end-of-life)
|
Notes
Author | Note |
---|---|
tyhicks | Exploiting this vulnerability requires a crafted filesystem image to be mounted |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19039
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039
- https://ubuntu.com/security/notices/USN-4414-1
- NVD
- Launchpad
- Debian