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CVE-2019-18885

Published: 14 November 2019

fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka CID-09ba3bc9dd15.

From the Ubuntu Security Team

It was discovered that the btrfs file system in the Linux kernel did not properly validate metadata, leading to a NULL pointer dereference. An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service (system crash).

Priority

Low

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1060.62)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
trusty
Released (4.4.0-1061.65)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.1~rc1)
xenial
Released (4.4.0-1101.112)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1024.27~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~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

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-88.88)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.2.0-8.9)
focal Not vulnerable
(5.4.0-9.12)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.1~rc1)
xenial
Released (4.4.0-173.203)
Patches:
Introduced by

2b82032c34ec40515d3c45c36cd1961f37977de8

Fixed by 09ba3bc9dd150457c506e4661380a6183af651c1
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.15.0-1060.62~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1029.31~18.04.1)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1002.2)
focal Not vulnerable
(5.4.0-1006.6)
trusty
Released (4.15.0-1071.76~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.1~rc1)
xenial
Released (4.15.0-1071.76)
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

trusty Does not exist

upstream
Released (5.1~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

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Ignored
(end of standard support, was needs-triage)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1029.30~18.04.1)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.15.0-1055.59)
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

trusty Does not exist

upstream
Released (5.1~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

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1052.55)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1029.30~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~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

trusty Does not exist

upstream
Released (5.1~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

trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.15.0-88.88~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(end of life, was pending)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Ignored
(end of life, was needs-triage)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1053.53)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1003.3)
focal Not vulnerable
(5.4.0-1004.4)
trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.4.0-1065.72)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~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

trusty
Released (4.4.0-173.203~14.04.1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (5.1~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1073.83)
disco Ignored
(end of life)
eoan
Released (4.15.0-1073.83)
focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
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 Not vulnerable
(5.4.0-1002.4)
trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1037.42)
disco Ignored
(end of life)
eoan
Released (5.0.0-1037.42)
focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1033.36)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1002.2)
focal Not vulnerable
(5.4.0-1005.5)
trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.15.0-1033.36~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1010.15~18.04.1)
disco Does not exist

eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1055.59)
disco Ignored
(end of life, was pending)
eoan Not vulnerable
(5.3.0-1005.6)
focal Not vulnerable
(5.4.0-1004.4)
trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.4.0-1128.137)
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

trusty Does not exist

upstream
Released (5.1~rc1)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1072.79)
disco Ignored
(end of life, was pending)
eoan Does not exist

focal Does not exist

trusty Does not exist

upstream
Released (5.1~rc1)
xenial
Released (4.4.0-1132.140)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H