Description
The vcpu_scan_ioapic function in arch/x86/kvm/x86.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic is uninitialized.
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 | 4.19.9-1 | — |
| Debian 13 | linux | 4.19.9-1 | — |
| Debian 12 | linux | 4.19.9-1 | — |
| Debian 8 | linux-4.9 | 4.9.144-3.1~deb8u1 | DLA-1715-1 |
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 18.04 LTS | linux | 4.15.0-44.47 | USN-3871-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1032.34 | USN-3871-3 |
| Ubuntu 18.04 LTS | linux-azure | 4.15.0-1037.39 | USN-3871-5 |
| Ubuntu 18.04 LTS | linux-gcp | 4.15.0-1027.28 | USN-3871-3 |
| Ubuntu 18.04 LTS | linux-gcp-edge | 4.18.0-1006.7~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-hwe | 4.18.0-14.15~18.04.1 | USN-3872-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1029.29 | USN-3871-3 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1033.38 | USN-3871-3 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1031.33 | USN-3871-3 |
| Ubuntu 16.04 LTS | linux | 4.4.0-142.168 | USN-3879-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1075.85 | USN-3879-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1032.34~16.04.1 | USN-3871-4 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1037.39~16.04.1 | USN-3871-5 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1027.28~16.04.1 | USN-3871-4 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-45.48~16.04.1 | USN-3871-4 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1040.46 | USN-3879-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1103.111 | USN-3879-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1107.112 | USN-3879-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1038.41 | USN-3879-2 |
| Ubuntu 14.04 LTS | linux-azure | 4.15.0-1037.39~14.04.2 | USN-3871-5 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-142.168~14.04.1 | USN-3879-2 |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | kernel-azure +2 | 4.12.14-5.19.1 | SUSE-SU-2019:0150-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-25.28.1 | SUSE-SU-2019:0224-1 |
| SLES 12 SP4 | kernel-azure +2 | 4.12.14-6.6.2 | SUSE-SU-2019:0222-1 |
| SLES 12 SP4 | kernel-docs +4 | 4.12.14-95.6.1 | SUSE-SU-2019:0196-1 |
| SLES 12 SP3 | kernel-azure +2 | 4.4.170-4.22.1 | SUSE-SU-2019:0148-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.175-94.79.1 | SUSE-SU-2019:0541-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.109.2 | SUSE-SU-2019:1287-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_29 | 1-3.5.2 | SUSE-SU-2019:1287-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_33 | 1-2.3.1 | SUSE-SU-2019:1289-1 |
| SLES 12 SP1 | lttng-modules | 2.7.0-4.4.1 | SUSE-SU-2019:1289-1 |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | kernel-ec2 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.87.1 | SUSE-SU-2019:13979-1 |
| SLES 11 SP4 | ocfs2 | 1.6-0.28.7.1 | SUSE-SU-2019:13979-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.59.1 | SUSE-SU-2019:13937-1 |
| SLES for SAP 12 SP4 | kernel-azure +2 | 4.12.14-6.6.2 | SUSE-SU-2019:0222-1 |
| SLES for SAP 12 SP4 | kernel-syms +2 | 4.12.14-95.6.1 | SUSE-SU-2019:0196-1 |
| SLES for SAP 12 SP3 | kernel-azure +2 | 4.4.170-4.22.1 | SUSE-SU-2019:0148-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.175-94.79.1 | SUSE-SU-2019:0541-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.109.2 | SUSE-SU-2019:1287-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_29 | 1-3.5.2 | SUSE-SU-2019:1287-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.110.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_33 | 1-2.3.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 12 SP1 | lttng-modules | 2.7.0-4.4.1 | SUSE-SU-2019:1289-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.87.1 | SUSE-SU-2019:13979-1 |
| SLE Real Time 12 SP3 | kernel-rt +1 | 4.4.170-3.32.2 | SUSE-SU-2019:0320-1 |
| SLE Real Time 12 SP3 | kernel-syms-rt +1 | 4.4.170-3.32.1 | SUSE-SU-2019:0320-1 |
| SLE Real Time 11 SP4 | ocfs2 | 1.6-0.28.7.1 | SUSE-SU-2019:13979-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-25.28.1 | SUSE-SU-2019:0224-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_8 | 1-1.3.1 | SUSE-SU-2019:0224-1 |
| SLE Live Patching 12 SP4 | kgraft-patch-SLE12-SP4_Update_2 | 1-6.3.1 | SUSE-SU-2019:0196-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_23 | 1-4.7.1 | SUSE-SU-2019:0541-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.109.2 | SUSE-SU-2019:1287-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_29 | 1-3.5.2 | SUSE-SU-2019:1287-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.59.1 | SUSE-SU-2019:13937-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.109.2 | SUSE-SU-2019:1287-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_29 | 1-3.5.2 | SUSE-SU-2019:1287-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.0 | kernel-source | 4.12.14-lp150.12.45.1 | openSUSE-SU-2019:0065-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | perf +8 | 4.14.88-88.73.amzn2 | ALAS2-2018-1133 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | perf +10 | 4.14.35-1844.1.3.el7uek | ELSA-2019-4509 |
Advisories 22
- USN-3879-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3879-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3871-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-1715-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-3871-3 linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3871-4 linux-hwe, linux-aws-hwe, linux-gcp vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3871-5 linux-azure vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-3872-1 linux-hwe vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2019:0222-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0150-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0224-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0320-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1287-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0148-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0196-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1289-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:0541-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:13979-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:0065-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2019:13937-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-4509 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 15, 2019
- ALAS2-2018-1133 Moderate: kernel security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 19, 2018
References
- USN-3879-2 vendor-advisory
- USN-3872-1 vendor-advisory
- USN-3878-1 vendor-advisory
- USN-3879-1 vendor-advisory
- USN-3871-5 vendor-advisory
- USN-3878-2 vendor-advisory
- USN-3871-4 vendor-advisory
- 105987 vdb-entry
- USN-3871-1 vendor-advisory
- USN-3871-3 vendor-advisory
- [debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update mailing-list
- https://lkml.org/lkml/2018/11/20/580