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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.4.6-1 | — |
| Debian 13 | linux | 4.4.6-1 | — |
| Debian 12 | linux | 4.4.6-1 | — |
| Debian 8 | linux | 3.16.7-ckt25-2+deb8u2 | DSA-3607-1 |
| Debian 7 | linux | 3.2.81-1 | DLA-516-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | perf +18 | 3.10.0-327.28.2.el7 | RHSA-2016:1539 |
| RHEL 6 | perf +16 | 2.6.32-642.11.1.el6 | RHSA-2016:2766 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-docs | 3.12.57-60.35.3 | SUSE-SU-2016:1019-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.57-60.35.1 | SUSE-SU-2016:1019-1 |
| SLES 12 | kernel-docs | 3.12.60-52.49.3 | SUSE-SU-2016:1690-1 |
| SLES 12 | kernel-ec2 | 3.12.57-60.35.1 | SUSE-SU-2016:1690-1, SUSE-SU-2016:1019-1 |
| SLES 12 | kernel-xen +4 | 3.12.60-52.49.1 | SUSE-SU-2016:1690-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-77.2 | SUSE-SU-2016:1672-1 |
| SLES 11 SP4 | kernel-ec2 +7 | 3.0.101-77.1 | SUSE-SU-2016:1672-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SLES 11 SP2 | kernel-ec2 +6 | 3.0.101-0.7.40.1 | SUSE-SU-2016:2074-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.57-60.35.1 | SUSE-SU-2016:1019-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.60-52.49.1 | SUSE-SU-2016:1690-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +7 | 3.0.101-77.1 | SUSE-SU-2016:1672-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.58-14.1 | SUSE-SU-2016:1764-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-54.1 | SUSE-SU-2016:1707-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_4 | 1-2.3 | SUSE-SU-2016:1019-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_14 | 1-2.1 | SUSE-SU-2016:1690-1 |
| SUSE OpenStack Cloud 5 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SUSE Manager Proxy 2.1 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
| SUSE Manager 2.1 | kernel-ec2 +6 | 3.0.101-0.47.79.1 | SUSE-SU-2016:1203-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +11 | 3.10.0-327.28.2.el7 | ELSA-2016-1539 |
Advisories 12
- RHSA-2016:1539 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:2766 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DLA-516-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3607-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:1672-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1764-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1707-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2074-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1203-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1019-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2016:1690-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2016-1539 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 2, 2016
References
- SUSE-SU-2016:1690 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3446c13b268af86391d06611327006b059b8bab1
- RHSA-2016:2766 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- https://github.com/torvalds/linux/commit/3446c13b268af86391d06611327006b059b8bab1
- SUSE-SU-2016:1764 vendor-advisory
- https://security-tracker.debian.org/tracker/CVE-2016-2143
- DSA-3607 vendor-advisory
- RHSA-2016:1539 vendor-advisory
- SUSE-SU-2016:1707 vendor-advisory
- SUSE-SU-2016:1672 vendor-advisory
- SUSE-SU-2016:1019 vendor-advisory
- SUSE-SU-2016:2074 vendor-advisory