CVE-2016-5195

Published: 19 October 2016

Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW."

From the Ubuntu security team

It was discovered that a race condition existed in the memory manager of the Linux kernel when handling copy-on-write breakage of private read-only memory mappings. A local attacker could use this to gain administrative privileges.

Priority

High

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
Patches:
Introduced by 0a27a14a62921b438bb6f33772690d345a089be6
Fixed by 19be0eaffa3ac7d8eb6784ad9bdbc7d67ed8e619
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc2)