Description
An out-of-bounds memory write issue was found in the Linux Kernel, version 3.13 through 5.4, in the way the Linux kernel's KVM hypervisor handled the 'KVM_GET_EMULATED_CPUID' ioctl(2) request to get CPUID features emulated by the KVM hypervisor. A user or process able to access the '/dev/kvm' device could use this flaw to crash the system, resulting in a denial of service.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Linux | Kernel | 3.13 through 5.4 | — |
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 | 5.4.6-1 | — |
| Debian 13 | linux | 5.4.6-1 | — |
| Debian 12 | linux | 5.4.6-1 | — |
| Debian 8 | linux | 3.16.81-1 | DLA-2068-1 |
| Debian 8 | linux-4.9 | 4.9.210-1~deb8u1 | DLA-2114-1 |
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 +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-88.88 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1060.62 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-aws-5.0 | 5.0.0-1024.27~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-azure | 5.0.0-1029.31~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-azure-5.3 | 5.3.0-1013.14~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-gcp +1 | 5.0.0-1029.30~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-gcp-5.3 +1 | 5.3.0-1012.13~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-gcp-edge +2 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gke-4.15 | 4.15.0-1052.55 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-hwe | 5.3.0-40.32~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1053.53 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1073.83 | — |
| Ubuntu 18.04 LTS | linux-oem-osp1 | 5.0.0-1037.42 | — |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1033.36 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-oracle-5.0 | 5.0.0-1010.15~18.04.1 | USN-4258-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1055.59 | USN-4287-1 |
| Ubuntu 18.04 LTS | linux-raspi2-5.3 | 5.3.0-1018.20~18.04.1 | USN-4284-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1072.79 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux | 4.4.0-173.203 | USN-4254-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1101.112 | USN-4254-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1060.62~16.04.1 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1071.76 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1055.59 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-88.88~16.04.1 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1065.72 | USN-4254-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1033.36~16.04.1 | USN-4287-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1128.137 | USN-4254-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1132.140 | USN-4254-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS 16.04 LTS | linux-fips | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1028.33 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-aws | 4.4.0-1061.65 | USN-4254-2 |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1071.76~14.04.1 | USN-4287-2 |
| Ubuntu Pro 14.04 LTS | linux-lts-xenial | 4.4.0-173.203~14.04.1 | USN-4254-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | kernel-rt +12 | 4.18.0-240.rt7.54.el8 | RHSA-2020:4609 |
| RHEL 8 | perf +26 | 4.18.0-240.el8 | RHSA-2020:4431 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1160.rt56.1131.el7 | RHSA-2020:4062 |
| RHEL 7 | perf +18 | 3.10.0-1160.el7 | RHSA-2020:4060 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | kernel-tools-libs-devel | 4.18.0-240.el8 | ALSA-2020:4431 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kernel-azure +2 | 4.12.14-8.27.1 | SUSE-SU-2020:0511-1 |
| SLES 15 SP1 | kernel-docs +5 | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-150.47.1 | SUSE-SU-2019:3381-1 |
| SLES 12 SP5 | kernel-azure +2 | 4.12.14-16.7.1 | SUSE-SU-2020:0093-1 |
| SLES 12 SP5 | kernel-docs +4 | 4.12.14-122.12.1 | SUSE-SU-2019:3389-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.34.1 | SUSE-SU-2019:3316-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLES 12 SP3 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SLES 12 SP3 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SLES for SAP 12 SP5 | kernel-azure +2 | 4.12.14-16.7.1 | SUSE-SU-2020:0093-1 |
| SLES for SAP 12 SP5 | kernel-syms +2 | 4.12.14-122.12.1 | SUSE-SU-2019:3389-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.34.1 | SUSE-SU-2019:3316-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SLES for SAP 12 SP3 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SLE Real Time 12 SP4 | kernel-rt +3 | 4.12.14-8.12.1 | SUSE-SU-2020:0599-1 |
| SLE Live Patching 15 SP1 | kernel-default | 4.12.14-197.34.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 SP1 | kernel-livepatch-SLE15-SP1_Update_9 | 1-3.5.1 | SUSE-SU-2020:0560-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-150.47.1 | SUSE-SU-2019:3381-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_17 | 1-1.3.2 | SUSE-SU-2019:3381-1 |
| SLE Live Patching 12 SP5 | kernel-default | 4.12.14-122.12.1 | SUSE-SU-2019:3389-1 |
| SLE Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_2 | 1-8.5.1 | SUSE-SU-2019:3389-1 |
| SLE Live Patching 12 SP4 | kernel-default | 4.12.14-95.48.1 | SUSE-SU-2020:0584-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_12 | 1-6.3.1 | SUSE-SU-2020:0584-1 |
| SUSE Real Time Module 15 SP1 | kernel-rt +3 | 4.12.14-14.17.1 | SUSE-SU-2020:0613-1 |
| SUSE OpenStack Cloud Crowbar 8 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SUSE OpenStack Cloud Crowbar 8 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
| SUSE OpenStack Cloud 8 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SUSE OpenStack Cloud 8 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.129.1 | SUSE-SU-2020:1255-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_34 | 1-3.3.1 | SUSE-SU-2020:1255-1 |
| SUSE HPE Helion OpenStack 8 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SUSE HPE Helion OpenStack 8 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
| SUSE Enterprise Storage 5 | kernel-syms +2 | 4.4.180-94.113.1 | SUSE-SU-2019:3379-1 |
| SUSE Enterprise Storage 5 | kgraft-patch-SLE12-SP3_Update_30 | 1-4.5.1 | SUSE-SU-2019:3379-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
| openSUSE Leap 15.1 | kernel-docs +8 | 4.12.14-lp151.28.40.1 | openSUSE-SU-2020:0336-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | kernel-livepatch-4.14.165-131.185 | 1.0-0.amzn2 | ALAS2-2020-1392 |
| Amazon Linux 2 | perf +8 | 4.14.165-131.185.amzn2 | ALAS2-2020-1392 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | perf +19 | 4.18.0-240.el8 | ELSA-2020-4431 |
| Oracle Linux 7 | kernel-uek +5 | 4.1.12-124.36.1.el7uek | ELSA-2020-5535, ELSA-2020-5533, ELSA-2020-5528 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1902.10.4.1.el7uek | ELSA-2020-5533, ELSA-2020-5528 |
| Oracle Linux 7 | perf +12 | 3.10.0-1160.el7 | ELSA-2020-5533, ELSA-2020-5528, ELSA-2020-4060 |
Advisories 33
- ALSA-2020:4431 Moderate: kernel security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2020:4431 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 17, 2026
- RHSA-2020:4062 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2020:4060 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- USN-4258-1 linux-aws-5.0, linux-gcp, linux-gke-5.0, linux-oracle-5.0 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4287-1 linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4284-1 linux, linux-aws, linux-azure, linux-azure-5.3, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-raspi2-5.3 vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2020:4609 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Aug 7, 2026
- USN-4287-2 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4254-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-4254-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-2114-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2068-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:0599-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1255-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0584-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3316-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0336-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0560-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3381-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3389-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:3379-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0511-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0093-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0613-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ALAS2-2020-1392 Important: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 9, 2024
- ELSA-2020-4431 Moderate: kernel security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ELSA-2020-4060 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
- ELSA-2020-5535 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 12, 2020
- ELSA-2020-5533 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 10, 2020
- ELSA-2020-5528 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 30, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19332
- https://www.openwall.com/lists/oss-security/2019/12/16/1
- https://lore.kernel.org/kvm/000000000000ea5ec20598d90e50%40google.com/
- http://packetstormsecurity.com/files/155890/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- [debian-lts-announce] 20200118 [SECURITY] [DLA 2068-1] linux security update mailing-list
- USN-4254-1 vendor-advisory
- USN-4254-2 vendor-advisory
- https://security.netapp.com/advisory/ntap-20200204-0002/
- USN-4258-1 vendor-advisory
- USN-4287-1 vendor-advisory
- USN-4287-2 vendor-advisory
- [debian-lts-announce] 20200302 [SECURITY] [DLA 2114-1] linux-4.9 security update mailing-list
- USN-4284-1 vendor-advisory
- openSUSE-SU-2020:0336 vendor-advisory