CVE-2016-2143

Priority
Description
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.
Ubuntu-Description
Marcin Koƛcielnicki 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
jdstrandandroid 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
sbeatties390x only
Package
Source: linux (LP Ubuntu Debian)
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (we do not support s390x on trusty)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-13.29)
Patches:
Break-fix:6252d702c5311ce916caf75ed82e5c8245171c92
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
This package is not directly supported by the Ubuntu Security Team
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (s390x only)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (s390x only)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Product
linux-krillin:not-affected (s390x only)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Patches:
This package is not directly supported by the Ubuntu Security Team
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
This package is not directly supported by the Ubuntu Security Team
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was not-affected [s390x only])
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was not-affected [s390x only])
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was not-affected [s390x only])
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):not-affected (4.4.0-13.29~14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (s390x only)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was ignored)
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1004.5)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):not-affected (4.4.0-1012.12)
Package
Upstream:released (4.5)
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):DNE
Product
linux-vegetahd:not-affected (s390x only)
More Information

Updated: 2020-09-10 05:06:44 UTC (commit 81a23a978c4436cd99e1d040e9e73e9146876281)