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CVE-2019-12819

Published: 13 June 2019

An issue was discovered in the Linux kernel before 5.0. The function __mdiobus_register() in drivers/net/phy/mdio_bus.c calls put_device(), which will trigger a fixed_mdio_bus_init use-after-free. This will cause a denial of service.

From the Ubuntu Security Team

It was discovered that the MDIO bus devices subsystem in the Linux kernel improperly dropped a device reference in an error condition, leading to a use-after-free. An attacker could use this to cause a denial of service (system crash).

Priority

Medium

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1047.49)
cosmic Ignored
(end of life)
disco Not vulnerable
(5.0.0-1001.1)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.0~rc8)
xenial
Released (4.4.0-1081.91)
linux-azure
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1014.14~18.04.1)
cosmic Ignored
(end of life)
disco Not vulnerable
(5.0.0-1001.1)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.0~rc8)
xenial
Released (4.15.0-1055.60)
linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-1047.49~16.04.1)
linux-euclid
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(end of life, was needs-triage)
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-58.64)
cosmic Ignored
(end of life, was pending)
disco Not vulnerable
(5.0.0-7.8)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.0~rc8)
xenial
Released (4.4.0-146.172)
Patches:
Introduced by

0c692d07842a67d9aa6b8266a80e4ac460a5c1a2

Fixed by 6ff7b060535e87c2ae14dd8548512abfdda528fb
linux-azure-edge
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-1014.14~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-1055.60)
linux-flo
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(abandoned)
linux-gcp
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1040.42)
cosmic Ignored
(end of life)
disco Not vulnerable
(5.0.0-1001.1)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-1040.42~16.04.1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1040.42)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(end of standard support)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1040.42)
disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-1011.11~18.04.1)
disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic
Released (5.0.0-23.24~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-58.64~16.04.1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.0.0-15.16~18.04.1)
cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-58.64~16.04.1)
linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1042.42)
cosmic Ignored
(end of life)
disco Not vulnerable
(5.0.0-1001.1)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.4.0-1044.50)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

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

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(abandoned)
linux-manta
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

upstream
Released (5.0~rc8)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1050.57)
cosmic Ignored
(end of life)
disco
Released (4.15.0-1050.57)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial Ignored
(end of standard support, was needs-triage)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1021.23)
cosmic Ignored
(end of life)
disco
Released (5.0.0-1004.8)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.15.0-1021.23~16.04.1)
linux-raspi2
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1043.46)
cosmic Ignored
(end of life)
disco Not vulnerable
(5.0.0-1004.4)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.4.0-1107.115)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1060.66)
cosmic Does not exist

disco Not vulnerable
(5.0.0-1010.10)
trusty Does not exist

upstream
Released (5.0~rc8)
xenial
Released (4.4.0-1111.116)

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:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H