Description
arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests.
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 | 4.17.15-1 | — |
| Debian 13 | linux | 4.17.15-1 | — |
| Debian 12 | linux | 4.17.15-1 | — |
| Debian 9 | linux | 4.9.110-3+deb9u5 | DSA-4308-1 |
| Debian 8 | linux | 3.16.59-1 | DLA-1529-1 |
| Debian 8 | linux-4.9 | 4.9.110-3+deb9u5~deb8u1 | DLA-1531-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | linux | 4.15.0-36.39 | USN-3777-1 |
| Ubuntu 18.04 LTS | linux-aws +1 | 4.15.0-1023.23 | USN-3777-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.15.0-1025.26 | USN-3777-3 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1021.22 | USN-3777-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1021.24 | USN-3777-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1024.26 | USN-3777-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-137.163 | USN-3776-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1069.79 | USN-3776-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1025.26~16.04.1 | USN-3777-3 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1021.22~16.04.1 | USN-3777-2 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-36.39~16.04.1 | USN-3777-2 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1035.41 | USN-3776-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1098.106 | USN-3776-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1102.107 | USN-3776-1 |
| Ubuntu 14.04 LTS | linux | 3.13.0-160.210 | USN-3775-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1031.34 | USN-3776-2 |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1030.31~14.04.1 | — |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-137.163~14.04.1 | USN-3776-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +10 | 3.10.0-1062.rt56.1022.el7 | RHSA-2019:2043 |
| RHEL 7 | perf +18 | 3.10.0-1062.el7 | RHSA-2019:2029 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | kernel-docs +1 | 4.4.178-94.91.2 | SUSE-SU-2019:1245-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.178-94.91.1 | SUSE-SU-2019:1245-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SLES 12 SP2 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.71.1 | SUSE-SU-2018:2879-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | kernel-default | 4.4.178-94.91.2 | SUSE-SU-2019:1245-1 |
| SLES for SAP 12 SP3 | kernel-syms +1 | 4.4.178-94.91.1 | SUSE-SU-2019:1245-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SLES for SAP 12 SP2 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.71.1 | SUSE-SU-2018:2879-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.36.1 | SUSE-SU-2018:3088-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_25 | 1-4.3.1 | SUSE-SU-2019:1245-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SUSE OpenStack Cloud 7 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.95.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_25 | 1-3.4.1 | SUSE-SU-2018:3084-1 |
| SUSE Enterprise Storage 4 | lttng-modules | 2.7.1-9.6.1 | SUSE-SU-2018:3084-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-debuginfo-common-aarch64 | 4.14.143-118.123.amzn2 | ALAS2-2019-1281 |
| Amazon Linux 2 | perf +7 | 4.14.67-71.56.amzn2 | ALAS2-2019-1281, ALAS2-2019-1280 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.18.9.el7uek | ELSA-2018-4208 |
| Oracle Linux 7 | perf +12 | 3.10.0-1062.el7 | ELSA-2019-2029 |
Advisories 19
- RHSA-2019:2043 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:2029 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-3777-3 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3777-1 linux, linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3776-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3775-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4308-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1529-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1531-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3777-2 linux-hwe, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3776-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2018:3084-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3088-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2879-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1245-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2-2019-1281 Moderate: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 23, 2019
- ALAS2-2019-1280 Moderate: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 19, 2019
- ELSA-2019-2029 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ELSA-2018-4208 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 4, 2018
References
- USN-3776-1 vendor-advisory
- https://twitter.com/grsecurity/status/1029324426142199808
- USN-3776-2 vendor-advisory
- USN-3777-1 vendor-advisory
- USN-3775-1 vendor-advisory
- [debian-lts-announce] 20181003 [SECURITY] [DLA 1531-1] linux-4.9 security update mailing-list
- https://github.com/torvalds/linux/commit/5800dc5c19f34e6e03b5adab1282535cb102fafd
- DSA-4308 vendor-advisory
- USN-3775-2 vendor-advisory
- 105120 vdb-entry
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1
- 1041601 vdb-entry
- USN-3777-2 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5800dc5c19f34e6e03b5adab1282535cb102fafd
- USN-3777-3 vendor-advisory
- openSUSE-SU-2019:1407 vendor-advisory
- RHSA-2019:2043 vendor-advisory
- RHSA-2019:2029 vendor-advisory