CVE-2019-18422
Fixed in a distro release EPSS 2%
An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled without changing processor level, some interrupts are unconditionally enabled during exception entry. So exceptions which occur when interrupts are masked will effectively unmask the interrupts. A malicious guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified.
Products: xen, debian_linux, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.12.1-r1 |
| Alpine 3.11 | xen | 4.13.0-r0 |
| Alpine 3.12 | xen | 4.13.0-r0 |
| Alpine 3.13 | xen | 4.13.0-r0 |
| Alpine 3.14 | xen | 4.13.0-r0 |
| Alpine 3.15 | xen | 4.13.0-r0 |
| Alpine 3.16 | xen | 4.13.0-r0 |
| Alpine 3.17 | xen | 4.13.0-r0 |
| Alpine 3.18 | xen | 4.13.0-r0 |
| Alpine 3.19 | xen | 4.13.0-r0 |
| Alpine 3.20 | xen | 4.13.0-r0 |
| Alpine 3.21 | xen | 4.13.0-r0 |
| Alpine 3.22 | xen | 4.13.0-r0 |
| Alpine 3.23 | xen | 4.13.0-r0 |
| Alpine 3.24 | xen | 4.13.0-r0 |
| Alpine 3.8 | xen | 4.10.4-r1 |
| Alpine 3.9 | xen | 4.11.2-r1 |
| Debian 10 | xen | 4.11.3+24-g14b62ab3e5-1~deb10u1 |
| Debian 12 | xen | 4.11.3+24-g14b62ab3e5-1 |
| Debian 13 | xen | 4.11.3+24-g14b62ab3e5-1 |
| Debian 14 | xen | 4.11.3+24-g14b62ab3e5-1 |
| Debian 9 | xen | 4.8.5.final+shim4.10.4-1+deb9u12 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_06-3.59.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_06-3.59.1 |
| SUSE Linux Enterprise Desktop 12 SP4 | xen | 4.11.3_02-2.20.1 |
| SUSE Linux Enterprise Module for Basesystem 15 | xen | 4.10.4_08-3.28.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | 4.12.1_04-3.6.1 |
| SUSE Linux Enterprise Module for Server Applications 15 | xen | 4.10.4_08-3.28.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | 4.12.1_04-3.6.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_06-3.59.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_06-3.59.1 |
| SUSE Linux Enterprise Server 12 SP4 | xen | 4.11.3_02-2.20.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_06-3.59.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.3_02-2.20.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | xen | 4.11.3_02-2.20.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_06-3.59.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_06-3.59.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |