CVE-2016-2143
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.4.6-1 |
| debian | bullseye | fixed | 4.4.6-1 |
| debian | forky | fixed | 4.4.6-1 |
| debian | sid | fixed | 4.4.6-1 |
| debian | trixie | fixed | 4.4.6-1 |
| rhel | 7.0 | affected | |
| debian | 6.0 | affected | |
| debian | 7.0 | affected | |
| debian | 8.0 | affected | |
| linux-kernel | affected | 3.2.79 |
References
- 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
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.