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

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-58.64)
	cosmic	Ignored (was pending now end-of-life)
	disco	Not vulnerable (5.0.0-7.8)
	precise	Ignored (was needs-triage ESM criteria)
	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-aws Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1047.49)
	cosmic	Ignored (reached end-of-life)
	disco	Not vulnerable (5.0.0-1001.1)
	precise	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.0~rc8)
	xenial	Released (4.4.0-1081.91)
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc8)
	xenial	Released (4.15.0-1047.49~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1014.14~18.04.1)
	cosmic	Ignored (reached end-of-life)
	disco	Not vulnerable (5.0.0-1001.1)
	precise	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.0~rc8)
	xenial	Released (4.15.0-1055.60)
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1014.14~18.04.1)
	cosmic	Does not exist
	disco	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc8)
	xenial	Released (4.15.0-1055.60)
linux-euclid Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc8)
	xenial	Ignored (was needs-triage now end-of-life)
linux-flo Launchpad, Ubuntu, Debian	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	precise	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 (reached end-of-life)
	disco	Not vulnerable (5.0.0-1001.1)
	precise	Does not exist
	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
	precise	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
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc8)
	xenial	Ignored (end-of-life)
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1040.42)
	disco	Does not exist
	precise	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
	precise	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
	precise	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
	precise	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
	precise	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
	precise	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 (reached end-of-life)
	disco	Not vulnerable (5.0.0-1001.1)
	precise	Does not exist
	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
	precise	Ignored (was needs-triage ESM criteria)
	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
	precise	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
	precise	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
	precise	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
	precise	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
	precise	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
	precise	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
	precise	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 (reached end-of-life)
	disco	Released (4.15.0-1050.57)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.0~rc8)
	xenial	Ignored (was needs-triage now end-of-life)
linux-oracle Launchpad, Ubuntu, Debian	bionic	Released (4.15.0-1021.23)
	cosmic	Ignored (reached end-of-life)
	disco	Released (5.0.0-1004.8)
	precise	Does not exist
	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 (reached end-of-life)
	disco	Not vulnerable (5.0.0-1004.4)
	precise	Does not exist
	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)
	precise	Does not exist
	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

References

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