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)
|
Notes
| Author | Note |
|---|---|
| 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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5195
- https://ubuntu.com/security/notices/USN-3107-1
- https://ubuntu.com/security/notices/USN-3106-4
- https://ubuntu.com/security/notices/USN-3106-3
- https://ubuntu.com/security/notices/USN-3106-2
- https://ubuntu.com/security/notices/USN-3106-1
- https://ubuntu.com/security/notices/USN-3105-2
- https://ubuntu.com/security/notices/USN-3105-1
- https://ubuntu.com/security/notices/USN-3104-1
- https://ubuntu.com/security/notices/USN-3107-2
- https://ubuntu.com/security/notices/USN-3104-2
- NVD
- Launchpad
- Debian