CVE-2016-2143: Input Validation
First published: Wed Apr 27 2016(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | 5.10.218-1 5.10.221-1 6.1.94-1 6.1.99-1 6.9.12-1 6.10.3-1 | |
| Linux Kernel | >=2.6.25<3.2.79 | |
| Linux Kernel | >=3.3<3.12.58 | |
| Linux Kernel | >=3.13<3.16.35 | |
| Linux Kernel | >=3.17<4.1.21 | |
| Linux Kernel | >=4.2<4.4.6 | |
| Debian Linux | =6.0 | |
| Debian Linux | =7.0 | |
| Debian Linux | =8.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Oracle Linux | =7-0 | |
| Linux Kernel | =4.4-rc8 |
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Reference Links
- 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
- https://git.kernel.org/linus/3446c13b268af86391d06611327006b059b8bab1
- https://git.kernel.org/linus/6252d702c5311ce916caf75ed82e5c8245171c92
Frequently Asked Questions
What is the severity of CVE-2016-2143?
CVE-2016-2143 is classified as a high severity vulnerability due to its potential to cause a system crash.
How do I fix CVE-2016-2143?
To remediate CVE-2016-2143, upgrade to a kernel version that is equal to or greater than 4.5.
Who is affected by CVE-2016-2143?
CVE-2016-2143 primarily affects local users on s390 platforms running vulnerable versions of the Linux kernel.
What impact can CVE-2016-2143 have?
CVE-2016-2143 can lead to a denial of service, resulting in system crashes for those affected.
What versions of the Linux kernel are affected by CVE-2016-2143?
CVE-2016-2143 affects Linux kernel versions below 4.5.
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