CVE-2016-2143
Published: 27 April 2016
The fork implementation in the Linux kernel before 4.5 on s390 platforms mishandles the case of four page-table levels, which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted application, related to arch/s390/include/asm/mmu_context.h and arch/s390/include/asm/pgalloc.h.
From the Ubuntu Security Team
Marcin KoĆcielnicki discovered that the Linux kernel's fork implementation incorrectly handled the case of four page-table levels on s390 platforms. A local attacker could use this to cause a denial of service (system crash) or possibly gain administrative privileges.
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 |
sbeattie | s390x only |
Priority
Status
Package | Release | Status |
---|---|---|
linux Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(s390x only)
|
trusty |
Not vulnerable
(we do not support s390x on trusty)
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Not vulnerable
(4.4.0-13.29)
|
|
Patches: Introduced by 6252d702c5311ce916caf75ed82e5c8245171c92 |
||
linux-armadaxp Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(s390x only)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-flo Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Not vulnerable
(s390x only)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Not vulnerable
(s390x only)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-raring Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-trusty Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(s390x only)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was not-affected [s390x only])
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was not-affected [s390x only])
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was not-affected [s390x only])
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Not vulnerable
(4.4.0-13.29~14.04.1)
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-maguro Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-mako Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Not vulnerable
(s390x only)
|
|
linux-manta Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
(trusty was ignored)
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Does not exist
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
precise |
Ignored
(end of life)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Not vulnerable
(s390x only)
|
|
xenial |
Not vulnerable
(4.4.0-1004.5)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
precise |
Does not exist
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Not vulnerable
(4.4.0-1012.12)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(s390x only)
|
trusty |
Does not exist
|
|
upstream |
Released
(4.5)
|
|
wily |
Does not exist
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.8 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |