CVE-2021-28705
Fixed in a distro release EPSS <1%
issues with partially successful P2M updates on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] x86 HVM and PVH guests may be started in populate-on-demand (PoD) mode, to provide a way for them to later easily have more memory assigned. Guests are permitted to control certain P2M aspects of individual pages via hypercalls. These hypercalls may act on ranges of pages specified via page orders (resulting in a power-of-2 number of pages). In some cases the hypervisor carries out the requests by splitting them into smaller chunks. Error handling in certain PoD cases has been insufficient in that in particular partial success of some operations was not properly accounted for. There are two code paths affected - page removal (CVE-2021-28705) and insertion of new pages (CVE-2021-28709). (We provide one patch which combines the fix to both issues.)
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 3.13 | xen | 4.14.3-r2 |
| Alpine 3.14 | xen | 4.15.1-r2 |
| Alpine 3.15 | xen | 4.15.1-r2 |
| Alpine 3.16 | xen | 4.15.1-r2 |
| Alpine 3.17 | xen | 4.15.1-r2 |
| Alpine 3.18 | xen | 4.15.1-r2 |
| Alpine 3.19 | xen | 4.15.1-r2 |
| Alpine 3.20 | xen | 4.15.1-r2 |
| Alpine 3.21 | xen | 4.15.1-r2 |
| Alpine 3.22 | xen | 4.15.1-r2 |
| Alpine 3.23 | xen | 4.15.1-r2 |
| Alpine 3.24 | xen | 4.15.1-r2 |
| 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 |