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UbuntuUSN-4462-1

HistoryAug 18, 2020 - 12:00 a.m.

Linux kernel vulnerability

2020-08-1800:00:00

ubuntu.com

ubuntu 18.04 esm

linux kernel

google container engine

oem systems

bcache subsystem

denial of service

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

AI Score

6.1

Confidence

High

EPSS

0.001

Percentile

44.3%

JSON

Releases

Ubuntu 18.04 ESM

Packages

linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
linux-oem-osp1 - Linux kernel for OEM systems

Details

It was discovered that the bcache subsystem in the Linux kernel did not
properly release a lock in some error conditions. A local attacker could
possibly use this to cause a denial of service.

OSVersionArchitecturePackageVersionFilename
Ubuntu18.04noarchlinux-image-5.0.0-1046-gke< 5.0.0-1046.47UNKNOWN
Ubuntu18.04noarchlinux-image-5.0.0-1046-gke-dbgsym< 5.0.0-1046.47UNKNOWN
Ubuntu18.04noarchlinux-image-5.0.0-1067-oem-osp1< 5.0.0-1067.72UNKNOWN
Ubuntu18.04noarchkernel-signed-image-5.0.0-1067-oem-osp1-di< 5.0.0-1067.72UNKNOWN
Ubuntu18.04noarchlinux-image-5.0.0-1067-oem-osp1-dbgsym< 5.0.0-1067.72UNKNOWN
Ubuntu18.04noarchlinux-image-gke-5.0< 5.0.0.1046.31UNKNOWN
Ubuntu18.04noarchlinux-gke-5.0< 5.0.0.1046.31UNKNOWN
Ubuntu18.04noarchlinux-headers-gke-5.0< 5.0.0.1046.31UNKNOWN
Ubuntu18.04noarchlinux-modules-extra-gke-5.0< 5.0.0.1046.31UNKNOWN
Ubuntu18.04noarchlinux-tools-gke-5.0< 5.0.0.1046.31UNKNOWN

OS	Version	Architecture	Package	Version	Filename
Ubuntu	18.04	noarch	linux-image-5.0.0-1046-gke	< 5.0.0-1046.47	UNKNOWN
Ubuntu	18.04	noarch	linux-image-5.0.0-1046-gke-dbgsym	< 5.0.0-1046.47	UNKNOWN
Ubuntu	18.04	noarch	linux-image-5.0.0-1067-oem-osp1	< 5.0.0-1067.72	UNKNOWN
Ubuntu	18.04	noarch	kernel-signed-image-5.0.0-1067-oem-osp1-di	< 5.0.0-1067.72	UNKNOWN
Ubuntu	18.04	noarch	linux-image-5.0.0-1067-oem-osp1-dbgsym	< 5.0.0-1067.72	UNKNOWN
Ubuntu	18.04	noarch	linux-image-gke-5.0	< 5.0.0.1046.31	UNKNOWN
Ubuntu	18.04	noarch	linux-gke-5.0	< 5.0.0.1046.31	UNKNOWN
Ubuntu	18.04	noarch	linux-headers-gke-5.0	< 5.0.0.1046.31	UNKNOWN
Ubuntu	18.04	noarch	linux-modules-extra-gke-5.0	< 5.0.0.1046.31	UNKNOWN
Ubuntu	18.04	noarch	linux-tools-gke-5.0	< 5.0.0.1046.31	UNKNOWN