CVE-2016-2143 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3446c13b268af86391d06611327006b059b8bab1 http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00019.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00059.html http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html http://rhn.redhat.com/errata/RHSA-2016-1539.html http://rhn.redhat.com/errata/RHSA-2016-2766.html http://www.debian.org/security/2016/dsa-3607 http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html https://github.com/torvalds/linux/commit/3446c13b268af86391d06611327006b059b8bab1 https://security-tracker.debian.org/tracker/CVE-2016-2143

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8