Description
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform mishandles IRET faults in processing NMIs that occurred during userspace execution, which might allow local users to gain privileges by triggering an NMI.
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 | 4.0.8-2 | — |
| Debian 13 | linux | 4.0.8-2 | — |
| Debian 12 | linux | 4.0.8-2 | — |
| Debian 8 | linux | 3.16.7-ckt11-1+deb8u2 | DSA-3313-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-59.98 | USN-2700-1, USN-2688-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-45.60~14.04.1 | USN-2689-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-25.26~14.04.1 | USN-2690-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-327.10.1.rt56.211.el7_2 | RHSA-2016:0212 |
| RHEL 7 | perf +18 | 3.10.0-327.10.1.el7 | RHSA-2016:0185 |
| RHEL 6 | perf +16 | 2.6.32-573.26.1.el6 | RHSA-2016:0715 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-327.rt56.171.el6rt | RHSA-2016:0224 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | kernel-ec2 +4 | 3.12.48-52.27.1 | SUSE-SU-2015:1727-1 |
| SLES 12 | kernel-xen +1 | 3.12.48-52.27.2 | SUSE-SU-2015:1727-1 |
| SLES 11 SP4 | kernel-docs | 3.0.101-68.2 | SUSE-SU-2015:2339-1 |
| SLES 11 SP4 | kernel-ec2 +7 | 3.0.101-68.1 | SUSE-SU-2015:2339-1 |
| SLES 11 SP3 | kernel-docs | 3.0.101-0.47.71.3 | SUSE-SU-2015:2108-1 |
| SLES 11 SP3 | kernel-ec2 +8 | 3.0.101-0.47.71.1 | SUSE-SU-2015:2108-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | kernel-syms +2 | 3.12.48-52.27.1 | SUSE-SU-2015:1727-1 |
| SLES for SAP 12 | kernel-xen | 3.12.48-52.27.2 | SUSE-SU-2015:1727-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +7 | 3.0.101-68.1 | SUSE-SU-2015:2339-1 |
| SLES for SAP 11 SP3 | kernel-ec2 +8 | 3.0.101-0.47.71.1 | SUSE-SU-2015:2108-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-48.1 | SUSE-SU-2015:2350-1 |
| SLE Real Time 11 SP3 | kernel-rt +2 | 3.0.101.rt130-0.33.44.2 | SUSE-SU-2016:0354-1 |
| SLE Real Time 11 SP3 | kernel-syms-rt | 3.0.101.rt130-0.33.44.1 | SUSE-SU-2016:0354-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_8 | 1-2.6 | SUSE-SU-2015:1727-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | kernel | 6.6.22.1-2 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.153.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.3.2.el6uek | 0.4.5-3.el6 | ELSA-2016-3519 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.3.2.el7uek | 0.4.5-3.el7 | ELSA-2016-3519 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.3.2.el7uek | ELSA-2016-3519 |
| Oracle Linux 7 | perf +11 | 3.10.0-327.10.1.el7 | ELSA-2016-0185 |
Advisories 16
- RHSA-2016:0715 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0224 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0212 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2016:0185 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2700-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2688-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3313-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2689-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2690-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2015:2339-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1727-1 Security update for kernel-source SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2108-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0354-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2350-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-3519 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 18, 2016
- ELSA-2016-0185 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 16, 2016
References
- RHSA-2016:0212 vendor-advisory
- SUSE-SU-2015:2350 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- SUSE-SU-2015:1727 vendor-advisory
- RHSA-2016:0715 vendor-advisory
- USN-2689-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- USN-2690-1 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b6e6a8334d56354853f9c255d1395c2ba570e0a
- 76005 vdb-entry
- USN-2691-1 vendor-advisory
- SUSE-SU-2016:0354 vendor-advisory
- SUSE-SU-2015:2339 vendor-advisory
- SUSE-SU-2015:2108 vendor-advisory
- USN-2688-1 vendor-advisory
- RHSA-2016:0185 vendor-advisory
- DSA-3313 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6
- [oss-security] 20150722 Linux x86_64 NMI security issues mailing-list
- RHSA-2016:0224 vendor-advisory
- https://github.com/torvalds/linux/commit/9b6e6a8334d56354853f9c255d1395c2ba570e0a
- USN-2687-1 vendor-advisory