CVE-2021-3308
Fixed in a distro release EPSS <1%
An issue was discovered in Xen 4.12.3 through 4.12.4 and 4.13.1 through 4.14.x. An x86 HVM guest with PCI pass through devices can force the allocation of all IDT vectors on the system by rebooting itself with MSI or MSI-X capabilities enabled and entries setup. Such reboots will leak any vectors used by the MSI(-X) entries that the guest might had enabled, and hence will lead to vector exhaustion on the system, not allowing further PCI pass through devices to work properly. HVM guests with PCI pass through devices can mount a Denial of Service (DoS) attack affecting the pass through of PCI devices to other guests or the hardware domain. In the latter case, this would affect the entire host.
Products: xen, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.11 | xen | 4.13.2-r4 |
| Alpine 3.12 | xen | 4.13.2-r4 |
| Alpine 3.13 | xen | 4.14.1-r1 |
| Alpine 3.14 | xen | 4.14.1-r2 |
| Alpine 3.15 | xen | 4.14.1-r2 |
| Alpine 3.16 | xen | 4.14.1-r2 |
| Alpine 3.17 | xen | 4.14.1-r2 |
| Alpine 3.18 | xen | 4.14.1-r2 |
| Alpine 3.19 | xen | 4.14.1-r2 |
| Alpine 3.20 | xen | 4.14.1-r2 |
| Alpine 3.21 | xen | 4.14.1-r2 |
| Alpine 3.22 | xen | 4.14.1-r2 |
| Alpine 3.23 | xen | 4.14.1-r2 |
| Alpine 3.24 | xen | 4.14.1-r2 |
| Debian 12 | xen | 4.14.1+11-gb0b734a8b3-1 |
| Debian 13 | xen | 4.14.1+11-gb0b734a8b3-1 |
| Debian 14 | xen | 4.14.1+11-gb0b734a8b3-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise Micro 5.0 | xen | 4.13.2_08-3.25.3 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | 4.13.2_08-3.25.3 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | 4.13.2_08-3.25.3 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | 4.11.4_20-2.60.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.4_09-3.39.3 |
| SUSE Linux Enterprise Server 15 SP1-BCL | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise Server 15 SP1-LTSS | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.4_20-2.60.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.4_09-3.39.3 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | xen | 4.12.4_08-3.43.3 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.4_09-3.39.3 |
| SUSE Manager Proxy 4.0 | xen | 4.12.4_08-3.43.3 |
| SUSE Manager Retail Branch Server 4.0 | xen | 4.12.4_08-3.43.3 |
| SUSE Manager Server 4.0 | xen | 4.12.4_08-3.43.3 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_20-2.60.1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_20-2.60.1 |