CVE-2021-28706
Fixed in a distro release EPSS 2%
guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.
Products: xen
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.11 | xen | 4.13.4-r2 |
| Alpine 3.12 | xen | 4.13.4-r2 |
| Alpine 3.12 | xen | 4.13.4-r3 |
| Alpine 3.13 | xen | 4.14.5-r0 |
| Alpine 3.14 | xen | 4.15.2-r0 |
| Alpine 3.15 | xen | 4.15.2-r0 |
| Debian 11 | xen | 4.14.3+32-g9de3671772-1~deb11u1 |
| Debian 12 | xen | 4.14.3+32-g9de3671772-1 |
| Debian 13 | xen | 4.14.3+32-g9de3671772-1 |
| Debian 14 | xen | 4.14.3+32-g9de3671772-1 |
| SUSE Enterprise Storage 6 | xen | 4.12.4_16-3.57.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_24-3.97.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | xen | 4.12.4_16-3.57.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | xen | 4.12.4_16-3.57.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | 4.10.4_30-3.68.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | 4.10.4_30-3.68.1 |
| SUSE Linux Enterprise Micro 5.0 | xen | 4.13.4_02-3.40.1 |
| SUSE Linux Enterprise Micro 5.1 | xen | 4.14.3_04-3.15.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | 4.13.4_02-3.40.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | xen | 4.14.3_04-3.15.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | 4.13.4_02-3.40.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | xen | 4.14.3_04-3.15.1 |
| SUSE Linux Enterprise Server 11 SP4-LTSS | xen | 4.4.4_50-61.67.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | 4.7.6_18-43.82.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_24-3.97.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_24-3.97.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | 4.11.4_24-2.65.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.4_16-3.55.1 |
| SUSE Linux Enterprise Server 15 SP1-BCL | xen | 4.12.4_16-3.57.1 |
| SUSE Linux Enterprise Server 15 SP1-LTSS | xen | 4.12.4_16-3.57.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_24-3.97.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.4_24-2.65.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.4_16-3.55.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | 4.10.4_30-3.68.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | xen | 4.12.4_16-3.57.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.4_16-3.55.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_24-3.97.1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_24-2.65.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_24-3.97.1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_24-2.65.1 |
| 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 15.2 | xen | 4.13.4_02-lp152.2.33.1 |
| openSUSE Leap 15.3 | xen | 4.14.3_04-3.15.1 |