CVE-2023-46842
Fixed in a distro release EPSS 9%CVSS 6.5
Unlike 32-bit PV guests, HVM guests may switch freely between 64-bit and other modes. This in particular means that they may set registers used to pass 32-bit-mode hypercall arguments to values outside of the range 32-bit code would be able to set them to. When processing of hypercalls takes a considerable amount of time, the hypervisor may choose to invoke a hypercall continuation. Doing so involves putting (perhaps updated) hypercall arguments in respective registers. For guests not running in 64-bit mode this further involves a certain amount of translation of the values. Unfortunately internal sanity checking of these translated values assumes high halves of registers to always be clear when invoking a hypercall. When this is found not to be the case, it triggers a consistency check in the hypervisor and causes a crash.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.16 | xen | 4.16.6-r0 |
| Alpine 3.17 | xen | 4.16.6-r0 |
| Alpine 3.18 | xen | 4.17.4-r0 |
| Alpine 3.19 | xen | 4.18.2-r0 |
| Alpine 3.20 | xen | 4.18.2-r0 |
| Alpine 3.21 | xen | 4.18.2-r0 |
| Alpine 3.22 | xen | 4.18.2-r0 |
| Alpine 3.23 | xen | 4.18.2-r0 |
| Alpine 3.24 | xen | 4.18.2-r0 |
| Debian 12 | xen | 4.17.5+23-ga4e5191dc0-1 |
| Debian 13 | xen | 4.19.1-1 |
| Debian 14 | xen | 4.19.1-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | xen | 4.13.5_12-150200.3.93.1 |
| SUSE Linux Enterprise Micro 5.1 | xen | 4.14.6_14-150300.3.72.1 |
| SUSE Linux Enterprise Micro 5.2 | xen | 4.14.6_14-150300.3.72.1 |
| SUSE Linux Enterprise Micro 5.3 | xen | 4.16.6_02-150400.4.55.1 |
| SUSE Linux Enterprise Micro 5.4 | xen | 4.16.6_02-150400.4.55.1 |
| SUSE Linux Enterprise Micro 5.5 | xen | 4.17.4_02-150500.3.30.1 |
| SUSE Linux Enterprise Micro 5.5 | xen | 4.17.4_04-150500.3.33.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | xen | 4.17.4_02-150500.3.30.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | xen | 4.17.4_04-150500.3.33.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | xen | 4.18.2_06-150600.3.3.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | xen | 4.17.4_02-150500.3.30.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | xen | 4.17.4_04-150500.3.33.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | xen | 4.18.2_06-150600.3.3.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.4_48-3.109.1 |
| SUSE Linux Enterprise Server 15 SP2-LTSS | xen | 4.13.5_12-150200.3.93.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.4_48-3.109.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | xen | 4.13.5_12-150200.3.93.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.4_48-3.109.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| Ubuntu 20.04 LTS | xen | no fix |
| Ubuntu 22.04 LTS | xen | no fix |
| Ubuntu 24.04 LTS | xen | no fix |
| Ubuntu 25.10 | xen | no fix |
| Ubuntu 26.04 LTS | xen | no fix |
| Ubuntu 26.10 | xen | no fix |
| openSUSE Leap 15.5 | xen | 4.17.4_02-150500.3.30.1 |
| openSUSE Leap 15.5 | xen | 4.17.4_04-150500.3.33.1 |
| openSUSE Leap 15.6 | xen | 4.18.2_06-150600.3.3.1 |
| openSUSE Leap Micro 5.3 | xen | 4.16.6_02-150400.4.55.1 |
| openSUSE Leap Micro 5.4 | xen | 4.16.6_02-150400.4.55.1 |
| openSUSE Leap Micro 5.5 | xen | 4.17.4_04-150500.3.33.1 |
| openSUSE Tumbleweed | xen | 4.18.2_02-1.1 |