CVE-2020-15563
Fixed in a distro release EPSS <1%
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage the vulnerability. x86 PV guests, as well as x86 HVM guests using hardware assisted paging (HAP), cannot leverage the vulnerability.
Products: xen, debian_linux, fedoraproject fedora, opensuse leap
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.12.3-r2 |
| Alpine 3.11 | xen | 4.13.1-r2 |
| Alpine 3.12 | xen | 4.13.1-r2 |
| Alpine 3.13 | xen | 4.13.1-r4 |
| Alpine 3.14 | xen | 4.13.1-r4 |
| Alpine 3.15 | xen | 4.13.1-r4 |
| Alpine 3.16 | xen | 4.13.1-r4 |
| Alpine 3.17 | xen | 4.13.1-r4 |
| Alpine 3.18 | xen | 4.13.1-r4 |
| Alpine 3.19 | xen | 4.13.1-r4 |
| Alpine 3.20 | xen | 4.13.1-r4 |
| Alpine 3.21 | xen | 4.13.1-r4 |
| Alpine 3.22 | xen | 4.13.1-r4 |
| Alpine 3.23 | xen | 4.13.1-r4 |
| Alpine 3.24 | xen | 4.13.1-r4 |
| Alpine 3.9 | xen | 4.11.4-r0 |
| Debian 10 | xen | 4.11.4+24-gddaaccbbab-1~deb10u1 |
| Debian 12 | xen | 4.11.4+24-gddaaccbbab-1 |
| Debian 13 | xen | 4.11.4+24-gddaaccbbab-1 |
| Debian 14 | xen | 4.11.4+24-gddaaccbbab-1 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_08-3.66.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_08-3.66.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | 4.10.4_12-3.35.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | 4.10.4_12-3.35.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | 4.12.3_04-3.22.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | 4.13.1_04-3.4.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | 4.12.3_04-3.22.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | 4.13.1_04-3.4.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_08-3.66.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_08-3.66.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | 4.11.4_04-2.30.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.3_04-3.18.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_08-3.66.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.4_04-2.30.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.3_04-3.18.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | 4.10.4_12-3.35.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.3_04-3.18.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_08-3.66.1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_04-2.30.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_08-3.66.1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_04-2.30.1 |
| Ubuntu 20.04 LTS | xen | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
| openSUSE Leap 15.1 | xen | 4.12.3_04-lp151.2.21.1 |
| openSUSE Leap 15.2 | xen | 4.13.1_04-lp152.2.3.1 |
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 |