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CVE-2014-9717

Published: 2 May 2016

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support
apw
seems that this is fixed by a large merge ending at the sha1, but
we have not identified the exact fix:
e0c9c0afd2fc958ffa34b697972721d81df8a56f

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Ignored
(end of life)
trusty Not vulnerable

upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Not vulnerable
(4.0.0-4.6)
xenial Not vulnerable
(4.2.0-16.19)
yakkety Not vulnerable
(4.4.0-21.37)
zesty Not vulnerable
(4.8.0-22.24)
Patches:
Introduced by

ce07d891a0891d3c0d0c2d73d577490486b809e1

Fixed by e0c9c0afd2fc958ffa34b697972721d81df8a56f
linux-armadaxp
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.1~rc1)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

zesty Does not exist

linux-ec2
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-flo
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

linux-fsl-imx51
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist

upstream
Released (4.1~rc1)
xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
linux-grouper
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

zesty Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life, was needs-triage)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was ignored [end of standard support])
upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was not-affected)
upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Does not exist
(trusty was not-affected [4.2.0-18.22~14.04.1])
upstream
Released (4.1~rc1)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (4.1~rc1)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

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

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Ignored
(end of life)
xenial Ignored
(abandoned)
yakkety Ignored
(end of life)
zesty Does not exist

linux-manta
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.1~rc1)
utopic Ignored
(end of life)
vivid Ignored
(end of life)
wily Ignored
(end of life)
xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-mvl-dove
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
lucid Ignored
(end of life)
precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
vivid Does not exist

wily Not vulnerable
(4.2.0-1008.12)
xenial Not vulnerable
(4.2.0-1013.19)
yakkety Not vulnerable
(4.4.0-1009.10)
zesty Not vulnerable
(4.8.0-1013.15)
linux-snapdragon
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.1~rc1)
wily Does not exist

xenial Not vulnerable
(4.4.0-1012.12)
yakkety Not vulnerable
(4.4.0-1012.12)
zesty Not vulnerable
(4.4.0-1029.32)
linux-ti-omap4
Launchpad, Ubuntu, Debian
lucid Does not exist

precise Ignored
(end of life)
trusty Does not exist

upstream
Released (4.1~rc1)
utopic Does not exist

vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality Low
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N