Description
The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5 improperly emulates a "MOV SS, NULL selector" instruction, which allows guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application.
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 | 4.9.6-1 | — |
| Debian 13 | linux | 4.9.6-1 | — |
| Debian 12 | linux | 4.9.6-1 | — |
| Debian 8 | linux | 3.16.39-1+deb8u1 | DSA-3791-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 16.04 LTS | linux | 4.4.0-63.84 | USN-3208-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1003.12 | — |
| Ubuntu 16.04 LTS | linux-hwe | 4.10.0-32.36~16.04.1 | USN-3361-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1044.51 | — |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1047.51 | USN-3208-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-157.207 | USN-3754-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-63.84~14.04.2 | USN-3208-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-514.26.1.rt56.442.el7 | RHSA-2017:1616 |
| RHEL 7 | perf +18 | 3.10.0-514.26.1.el7 | RHSA-2017:1615 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-docs | 4.4.49-92.11.3 | SUSE-SU-2017:0575-1 |
| SLES 12 SP2 | kernel-syms +3 | 4.4.49-92.11.1 | SUSE-SU-2017:0575-1 |
| SLES 12 SP1 | kernel-docs | 3.12.69-60.64.29.3 | SUSE-SU-2017:0464-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.69-60.64.29.1 | SUSE-SU-2017:0464-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1, SUSE-SU-2017:0464-1 |
| SLES 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.49-92.11.1 | SUSE-SU-2017:0575-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.69-60.64.29.1 | SUSE-SU-2017:0464-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.61-52.66.1 | SUSE-SU-2017:0471-1 |
| SLES for SAP 12 | kgraft-patch-SLE12_Update_19 | 1-2.1 | SUSE-SU-2017:0471-1 |
| SLE Real Time 12 SP2 | kernel-rt +3 | 4.4.74-7.10.1 | SUSE-SU-2017:1990-1 |
| SLE Real Time 12 SP1 | kernel-rt +5 | 3.12.69-60.30.1 | SUSE-SU-2017:0407-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_12 | 1-4.1 | SUSE-SU-2017:0464-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP2_Update_5 | 1-6.1 | SUSE-SU-2017:0575-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.18.2.el6uek | 0.4.5-3.el6 | ELSA-2017-3566 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.18.2.el7uek | 0.4.5-3.el7 | ELSA-2017-3566 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.34.el6uek | 0.5.3-2.el6 | ELSA-2017-3539 |
| Oracle Linux 7 | dtrace-modules-4.1.12-61.1.34.el7uek | 0.5.3-2.el7 | ELSA-2017-3539 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.18.2.el7uek | ELSA-2017-3566, ELSA-2017-3539 |
| Oracle Linux 7 | perf +11 | 3.10.0-514.26.1.el7 | ELSA-2017-1615 |
Advisories 15
- RHSA-2017:1616 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2017:1615 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3361-1 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3754-1 linux vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3208-1 linux, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3791-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3208-2 linux-lts-xenial vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2017:0471-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0464-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0575-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:0407-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:1990-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2017-1615 Important: kernel security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 28, 2017
- ELSA-2017-3566 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 16, 2017
- ELSA-2017-3539 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 13, 2017
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1414735
- https://github.com/torvalds/linux/commit/33ab91103b3415e12457e3104f0e4517ce12d0f3
- RHSA-2017:1615 vendor-advisory
- [oss-security] 20170119 CVE-2017-2583 Kernel: Kvm: vmx/svm potential privilege escalation inside guest mailing-list
- USN-3754-1 vendor-advisory
- 95673 vdb-entry
- RHSA-2017:1616 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=33ab91103b3415e12457e3104f0e4517ce12d0f3
- DSA-3791 vendor-advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5