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CVE-2014-4655

Published: 3 July 2014

The snd_ctl_elem_add function in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not properly maintain the user_ctl_count value, which allows local users to cause a denial of service (integer overflow and limit bypass) by leveraging /dev/snd/controlCX access for a large number of SNDRV_CTL_IOCTL_ELEM_REPLACE ioctl calls.

From the Ubuntu Security Team

A flaw discovered in how the snd_ctl_elem function of the Advanced Linux Sound Architecture (ALSA) handled a reference count. A local user could exploit this flaw to cause a denial of service (integer overflow and limit bypass).

Notes

AuthorNote
jdstrand
android kernels (goldfish, grouper, maguro, mako and manta) are not
supported on the Ubuntu Touch 13.10 preview kernels
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
Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 82262a46627bebb0febcc26664746c25cef08563
linux-2.6
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-ec2
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-grouper
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-quantal
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-saucy
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-utopic
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-vivid
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-wily
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-maguro
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-mako
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-manta
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-mvl-dove
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-qcm-msm
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-raspi2
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)
linux-ti-omap4
Launchpad, Ubuntu, Debian
upstream
Released (3.16~rc2)