CVE-2016-7916

Published: 16 November 2016

Race condition in the environ_read function in fs/proc/base.c in the Linux kernel before 4.5.4 allows local users to obtain sensitive information from kernel memory by reading a /proc/*/environ file during a process-setup time interval in which environment-variable copying is incomplete.

From the Ubuntu security team

It was discovered that a race condition existed in the procfs environ_read function in the Linux kernel, leading to an integer underflow. A local attacker could use this to expose sensitive information (kernel memory).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
Patches:
Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Fixed by 8148a73c9901a8794a50f950083c00ccf97d43b3
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.6~rc7)