CVE-2014-8559

Published: 10 November 2014

The d_walk function in fs/dcache.c in the Linux kernel through 3.17.2 does not properly maintain the semantics of rename_lock, which allows local users to cause a denial of service (deadlock and system hang) via a crafted application.

From the Ubuntu security team

A flaw was discovered with file renaming in the linux kernel. A local user could exploit this flaw to cause a denial of service (deadlock and system hang).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
Patches:
Introduced by c826cb7dfce80512c26c984350077a25046bd215
Fixed by 946e51f2bf37f1656916eb75bd0742ba33983c28
Introduced by c826cb7dfce80512c26c984350077a25046bd215
Fixed by ca5358ef75fc69fee5322a38a340f5739d997c10
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (3.19~rc1)

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.04 preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support
"See vfs.git#experimental-d_walk - the first commit there moves
d_rcu from d_child to d_alias, the second is basically "skip the killed
siblings rather than restarting the tree walk"

References

Bugs