Description
kernel KVM before versions kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2 and kernel 4.17-rc3 is vulnerable to a flaw in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| kernel | KVM | kernel 4.16, kernel 4.16-rc7, kernel 4.17-rc1, kernel 4.17-rc2, kernel 4.17-rc3 | — |
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 | 4.15.17-1 | — |
| Debian 13 | linux | 4.15.17-1 | — |
| Debian 12 | linux | 4.15.17-1 | — |
| Debian 9 | linux | 4.9.88-1+deb9u1 | DSA-4196-1 |
| Debian 8 | linux | 3.16.56-1+deb8u1 | DSA-4196-1 |
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 | 4.4.0-124.148 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1057.66 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.13.0-1016.19 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-euclid | 4.4.0-9027.29 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.13.0-1015.19 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.13.0-41.46~16.04.1 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1023.28 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-oem | 4.13.0-1026.29 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1089.97 | USN-3641-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1092.97 | USN-3641-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-147.196 | USN-3641-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1019.19 | USN-3641-1 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-124.148~14.04.1 | USN-3641-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | imgbased +1 | 1.0.16-0.1.el7ev | RHSA-2018:1524 |
| RHEL 7 | kernel-rt +10 | 3.10.0-862.2.3.rt56.806.el7 | RHSA-2018:1355 |
| RHEL 7 | ovirt-node-ng +1 | 4.2.0-0.20170814.0.el7 | RHSA-2018:1524 |
| RHEL 7 | perf +18 | 3.10.0-862.2.3.el7 | RHSA-2018:1318 |
| RHEL 7 | redhat-release-virtualization-host +1 | 4.2-3.0.el7 | RHSA-2018:1524 |
| RHEL 7 | redhat-virtualization-host +1 | 3.6-20180521.0.el7_3 | RHSA-2018:1710, RHSA-2018:1524 |
| RHEL 7 | rhev-hypervisor7 | 7.3-20180521.1.el7ev | RHSA-2018:1711 |
| RHEL 6 | rhev-hypervisor7 | 7.3-20180521.1.el6ev | RHSA-2018:1711 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.4 EUS | perf +18 | 3.10.0-693.25.4.el7 | RHSA-2018:1345 |
| RHEL 7.3 EUS | perf +18 | 3.10.0-514.48.3.el7 | RHSA-2018:1348 |
| RHEL 7.2 TUS | perf +12 | 3.10.0-327.66.3.el7 | RHSA-2018:1347 |
| RHEL 7.2 E4S | perf +12 | 3.10.0-327.66.3.el7 | RHSA-2018:1347 |
| RHEL 7.2 AUS | perf +12 | 3.10.0-327.66.3.el7 | RHSA-2018:1347 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.73.1 | SUSE-SU-2018:1173-2, SUSE-SU-2018:1173-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_11 +1 | 10-2.1 | SUSE-SU-2018:1534-1, SUSE-SU-2018:1524-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_13 | 9-2.1 | SUSE-SU-2018:1545-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_14 +1 | 7-2.1 | SUSE-SU-2018:1548-1, SUSE-SU-2018:1516-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_16 +1 | 6-2.1 | SUSE-SU-2018:1518-1, SUSE-SU-2018:1510-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_18 +1 | 4-2.1 | SUSE-SU-2018:1530-1, SUSE-SU-2018:1511-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_20 | 3-2.1 | SUSE-SU-2018:1523-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_21 | 1-3.3.1 | SUSE-SU-2018:1173-2, SUSE-SU-2018:1173-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_8 | 12-2.1 | SUSE-SU-2018:1522-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_9 +1 | 11-2.1 | SUSE-SU-2018:1536-1, SUSE-SU-2018:1505-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.88.1 | SUSE-SU-2018:1220-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_27 | 1-2.3.1 | SUSE-SU-2018:1220-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.128.1 | SUSE-SU-2018:1221-1, SUSE-SU-2018:1220-1 |
| SLES 12 | kgraft-patch-SLE12_Update_34 | 1-1.3.1 | SUSE-SU-2018:1221-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.41.1 | SUSE-SU-2018:1171-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.22.1 | SUSE-SU-2018:1172-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.73.1 | SUSE-SU-2018:1173-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_11 +1 | 10-2.1 | SUSE-SU-2018:1534-1, SUSE-SU-2018:1524-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_13 | 9-2.1 | SUSE-SU-2018:1545-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_14 +1 | 7-2.1 | SUSE-SU-2018:1548-1, SUSE-SU-2018:1516-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_16 +1 | 6-2.1 | SUSE-SU-2018:1518-1, SUSE-SU-2018:1510-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_18 +1 | 4-2.1 | SUSE-SU-2018:1530-1, SUSE-SU-2018:1511-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_20 | 3-2.1 | SUSE-SU-2018:1523-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_21 | 1-3.3.1 | SUSE-SU-2018:1173-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_8 | 12-2.1 | SUSE-SU-2018:1522-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_9 +1 | 11-2.1 | SUSE-SU-2018:1536-1, SUSE-SU-2018:1505-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.88.1 | SUSE-SU-2018:1220-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_27 | 1-2.3.1 | SUSE-SU-2018:1220-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.41.1 | SUSE-SU-2018:1171-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_1 | 9-2.1 | SUSE-SU-2018:1643-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_10 | 3-2.1 | SUSE-SU-2018:1636-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_2 +1 | 8-2.1 | SUSE-SU-2018:1642-1, SUSE-SU-2018:1641-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_4 | 7-2.1 | SUSE-SU-2018:1648-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_5 +2 | 6-2.1 | SUSE-SU-2018:1645-1, SUSE-SU-2018:1640-1, SUSE-SU-2018:1637-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_8 +1 | 4-2.1 | SUSE-SU-2018:1644-1, SUSE-SU-2018:1639-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.73.1 | SUSE-SU-2018:1173-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_21 | 1-3.3.1 | SUSE-SU-2018:1173-1 |
| SUSE OpenStack Cloud 6 | kernel-xen +3 | 3.12.74-60.64.88.1 | SUSE-SU-2018:1220-1 |
| SUSE OpenStack Cloud 6 | kgraft-patch-SLE12-SP1_Update_27 | 1-2.3.1 | SUSE-SU-2018:1220-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.22.1 | SUSE-SU-2018:1172-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.73.1 | SUSE-SU-2018:1173-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_21 | 1-3.3.1 | SUSE-SU-2018:1173-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | perf +7 | 4.14.42-61.37.amzn2 | ALAS2-2018-1023 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.14.5.el7uek | ELSA-2018-4096 |
| Oracle Linux 7 | perf +11 | 3.10.0-862.2.3.el7 | ELSA-2018-1318 |
Advisories 42
- RHSA-2018:1711 Red Hat Security Advisory: rhev-hypervisor7 security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1710 Red Hat Security Advisory: redhat-virtualization-host security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1524 Red Hat Security Advisory: redhat-virtualization-host bug fix and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1355 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1348 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1345 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1347 Red Hat Security Advisory: kernel security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1318 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3641-1 linux, linux-aws, linux-azure, linux-euclid, linux-gcp, linux-hwe, linux-kvm, linux-lts-xenial, linux-oem, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4196-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:1221-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1536-1 Security update for the Linux Kernel (Live Patch 9 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1173-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1648-1 Security update for the Linux Kernel (Live Patch 4 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1640-1 Security update for the Linux Kernel (Live Patch 7 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1511-1 Security update for the Linux Kernel (Live Patch 19 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1516-1 Security update for the Linux Kernel (Live Patch 15 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1523-1 Security update for the Linux Kernel (Live Patch 20 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1545-1 Security update for the Linux Kernel (Live Patch 13 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1518-1 Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1636-1 Security update for the Linux Kernel (Live Patch 10 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1642-1 Security update for the Linux Kernel (Live Patch 2 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1530-1 Security update for the Linux Kernel (Live Patch 18 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1644-1 Security update for the Linux Kernel (Live Patch 8 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1522-1 Security update for the Linux Kernel (Live Patch 8 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1641-1 Security update for the Linux Kernel (Live Patch 3 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1524-1 Security update for the Linux Kernel (Live Patch 11 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1510-1 Security update for the Linux Kernel (Live Patch 17 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1645-1 Security update for the Linux Kernel (Live Patch 6 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1220-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1505-1 Security update for the Linux Kernel (Live Patch 10 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1548-1 Security update for the Linux Kernel (Live Patch 14 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1643-1 Security update for the Linux Kernel (Live Patch 1 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1173-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1172-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1637-1 Security update for the Linux Kernel (Live Patch 5 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1639-1 Security update for the Linux Kernel (Live Patch 9 for SLE 12 SP3) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1534-1 Security update for the Linux Kernel (Live Patch 12 for SLE 12 SP2) SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1171-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2018-1023 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 29, 2018
- ELSA-2018-1318 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 9, 2018
- ELSA-2018-4096 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 8, 2018
References
- RHSA-2018:1347 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1087
- 1040862 vdb-entry
- RHSA-2018:1348 vendor-advisory
- DSA-4196 vendor-advisory
- RHSA-2018:1355 vendor-advisory
- RHSA-2018:1345 vendor-advisory
- https://access.redhat.com/security/vulnerabilities/pop_ss
- RHSA-2018:1318 vendor-advisory
- RHSA-2018:1524 vendor-advisory
- http://www.openwall.com/lists/oss-security/2018/05/08/5
- 104127 vdb-entry
- USN-3641-2 vendor-advisory
- USN-3641-1 vendor-advisory