CVE-2020-25599
Fixed in a distro release EPSS <1%
An issue was discovered in Xen through 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable.
Products: xen, fedoraproject fedora, opensuse leap, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.12.3-r4 |
| Alpine 3.11 | xen | 4.13.1-r4 |
| Alpine 3.12 | xen | 4.13.1-r4 |
| Alpine 3.13 | xen | 4.14.0-r1 |
| Alpine 3.14 | xen | 4.14.0-r1 |
| Alpine 3.15 | xen | 4.14.0-r1 |
| Alpine 3.16 | xen | 4.14.0-r1 |
| Alpine 3.17 | xen | 4.14.0-r1 |
| Alpine 3.18 | xen | 4.14.0-r1 |
| Alpine 3.19 | xen | 4.14.0-r1 |
| Alpine 3.20 | xen | 4.14.0-r1 |
| Alpine 3.21 | xen | 4.14.0-r1 |
| Alpine 3.22 | xen | 4.14.0-r1 |
| Alpine 3.23 | xen | 4.14.0-r1 |
| Alpine 3.24 | xen | 4.14.0-r1 |
| Alpine 3.9 | xen | 4.11.4-r2 |
| Debian 10 | xen | 4.11.4+37-g3263f257ca-1 |
| Debian 12 | xen | 4.14.0+80-gd101b417b7-1 |
| Debian 13 | xen | 4.14.0+80-gd101b417b7-1 |
| Debian 14 | xen | 4.14.0+80-gd101b417b7-1 |
| SUSE Enterprise Storage 5 | xen | 4.9.4_12-3.74.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_12-3.74.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | 4.10.4_16-3.41.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | 4.10.4_16-3.41.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | 4.12.3_08-3.28.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | xen | 4.13.1_08-3.10.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | 4.12.3_08-3.28.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | xen | 4.13.1_08-3.10.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | 4.7.6_10-43.67.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | xen | 4.7.6_10-43.67.1 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_12-3.74.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_12-3.74.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | 4.11.4_08-2.36.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.3_08-3.24.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | 4.7.6_10-43.67.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_12-3.74.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.4_08-2.36.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.3_08-3.24.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | 4.10.4_16-3.41.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.3_08-3.24.1 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_10-43.67.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_12-3.74.1 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_08-2.36.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_12-3.74.1 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_08-2.36.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| Ubuntu 20.04 LTS | xen | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
| openSUSE Leap 15.2 | xen | 4.13.1_08-lp152.2.9.1 |
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 |