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CVE-2016-6197

Published: 6 August 2016

fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.

From the Ubuntu Security Team

It was discovered that the OverlayFS implementation in the Linux kernel did not properly verify dentry state before proceeding with unlink and rename operations. A local attacker could use this to cause a denial of service (system crash).

Priority

Low

Cvss 3 Severity Score

5.5

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.10.0-19.21)
cosmic Not vulnerable
(4.15.0-20.21)
disco Not vulnerable
(4.18.0-10.11)
trusty Ignored
(was needed ESM criteria)
wily Ignored
(end of life)
xenial
Released (4.4.0-36.55)
yakkety Not vulnerable
(4.8.0-11.12)
zesty Not vulnerable
(4.8.0-22.24)
bionic Not vulnerable
(4.13.0-16.19)
upstream
Released (4.6~rc1)
precise Ignored
(end of life)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 11f3710417d026ea2f4fcf362d866342c5274185
linux-armadaxp
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

upstream
Released (4.6~rc1)
bionic Does not exist

precise Ignored
(end of life)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
cosmic Not vulnerable
(4.15.0-1007.7)
disco Not vulnerable
(4.18.0-1002.3)
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable
(4.15.0-1001.1)
upstream
Released (4.6~rc1)
artful Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
bionic Does not exist

upstream
Released (4.6~rc1)
linux-azure
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Not vulnerable
(4.15.0-1009.9)
disco Not vulnerable
(4.18.0-1003.3)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
xenial Not vulnerable
(4.11.0-1009.9)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable
(4.15.0-1002.2)
upstream
Released (4.6~rc1)
linux-azure-edge
Launchpad, Ubuntu, Debian
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Not vulnerable
(4.11.0-1009.9)
bionic Not vulnerable
(4.15.0-1002.2)
upstream
Released (4.6~rc1)
linux-euclid
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Not vulnerable
(4.4.0-9019.20)
zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-flo
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-gcp
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Not vulnerable
(4.15.0-1006.6)
disco Not vulnerable
(4.18.0-1002.3)
trusty Does not exist

xenial Not vulnerable
(4.10.0-1004.4)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable
(4.15.0-1001.1)
upstream
Released (4.6~rc1)
linux-gcp-edge
Launchpad, Ubuntu, Debian
cosmic Does not exist

disco Does not exist

trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(4.18.0-1004.5~18.04.1)
upstream
Released (4.6~rc1)
linux-gke
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable

upstream
Released (4.6~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
bionic Does not exist

upstream
Released (4.6~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable
(4.18.0-13.14~18.04.1)
upstream
Released (4.6~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist

xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

bionic Not vulnerable
(5.0.0-13.14~18.04.2)
upstream
Released (4.6~rc1)
linux-kvm
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Not vulnerable
(4.15.0-1008.8)
disco Not vulnerable
(4.18.0-1003.3)
trusty Does not exist

xenial Not vulnerable
(4.4.0-1004.9)
zesty Does not exist

bionic Not vulnerable
(4.15.0-1002.2)
upstream
Released (4.6~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
precise Ignored
(end of life)
linux-linaro-shared
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
precise Ignored
(end of life)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
precise Ignored
(end of life)
linux-lts-quantal
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
precise Ignored
(end of life)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Ignored
(end of life, was ignored)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Ignored
(end of life, was needed)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Ignored
(end of life, was ignored)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty
Released (4.4.0-36.55~14.04.1)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-mako
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-manta
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
wily Ignored
(end of life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-oem
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Not vulnerable
(4.15.0-1004.5)
disco Not vulnerable
(4.15.0-1021.24)
trusty Does not exist

xenial Not vulnerable
(4.13.0-1008.9)
zesty Does not exist

upstream
Released (4.6~rc1)
bionic Not vulnerable
(4.15.0-1002.3)
linux-oracle
Launchpad, Ubuntu, Debian
cosmic Not vulnerable
(4.15.0-1007.9)
disco Not vulnerable
(4.15.0-1007.9)
trusty Does not exist

xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
bionic Not vulnerable
(4.15.0-1007.9)
upstream
Released (4.6~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.10.0-1004.6)
cosmic Not vulnerable
(4.15.0-1010.11)
disco Not vulnerable
(4.18.0-1005.7)
precise Does not exist

trusty Does not exist

wily Ignored
(end of life)
xenial
Released (4.4.0-1021.27)
yakkety Not vulnerable
(4.8.0-1012.14)
zesty Not vulnerable
(4.8.0-1013.15)
bionic Not vulnerable
(4.13.0-1005.5)
upstream
Released (4.6~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
artful Not vulnerable
(4.4.0-1050.54)
cosmic Does not exist

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

trusty Does not exist

wily Does not exist

xenial
Released (4.4.0-1024.27)
yakkety Not vulnerable
(4.4.0-1029.32)
zesty Not vulnerable
(4.4.0-1029.32)
upstream
Released (4.6~rc1)
bionic Not vulnerable
(4.4.0-1077.82)
linux-ti-omap4
Launchpad, Ubuntu, Debian
artful Does not exist

cosmic Does not exist

disco Does not exist

precise Ignored
(end of life)
trusty Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

bionic Does not exist

upstream
Released (4.6~rc1)

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