CVE-2018-12893
Fixed in a distro release EPSS <1%
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
Products: xen, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.11.0-r0 |
| Alpine 3.11 | xen | 4.11.0-r0 |
| Alpine 3.12 | xen | 4.11.0-r0 |
| Alpine 3.13 | xen | 4.11.0-r0 |
| Alpine 3.14 | xen | 4.11.0-r0 |
| Alpine 3.15 | xen | 4.11.0-r0 |
| Alpine 3.16 | xen | 4.11.0-r0 |
| Alpine 3.17 | xen | 4.11.0-r0 |
| Alpine 3.18 | xen | 4.11.0-r0 |
| Alpine 3.19 | xen | 4.11.0-r0 |
| Alpine 3.20 | xen | 4.11.0-r0 |
| Alpine 3.21 | xen | 4.11.0-r0 |
| Alpine 3.22 | xen | 4.11.0-r0 |
| Alpine 3.23 | xen | 4.11.0-r0 |
| Alpine 3.24 | xen | 4.11.0-r0 |
| Alpine 3.5 | xen | 4.7.6-r0 |
| Alpine 3.6 | xen | 4.8.4-r0 |
| Alpine 3.7 | xen | 4.9.3-r0 |
| Alpine 3.8 | xen | 4.10.1-r3 |
| Alpine 3.9 | xen | 4.11.0-r0 |
| Debian 12 | xen | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| Debian 13 | xen | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| Debian 14 | xen | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| Debian 8 | xen | 4.4.4lts4-0+deb8u1 |
| Debian 9 | xen | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| SUSE Enterprise Storage 4 | xen | 4.7.6_02-43.36.1 |
| SUSE Linux Enterprise Desktop 12 SP3 | xen | 4.9.2_08-3.35.2 |
| SUSE Linux Enterprise Module for Basesystem 15 | xen | 4.10.1_06-3.3.1 |
| SUSE Linux Enterprise Module for Server Applications 15 | xen | 4.10.1_06-3.3.1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | xen | 4.2.5_21-45.25.1 |
| SUSE Linux Enterprise Server 11 SP3-LTSS | xen | 4.2.5_21-45.25.1 |
| SUSE Linux Enterprise Server 11 SP4 | xen | 4.4.4_34-61.32.1 |
| SUSE Linux Enterprise Server 12 SP1-LTSS | xen | 4.5.5_24-22.52.3 |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | 4.7.6_02-43.36.1 |
| SUSE Linux Enterprise Server 12 SP2-LTSS | xen | 4.7.6_02-43.36.1 |
| SUSE Linux Enterprise Server 12 SP3 | xen | 4.9.2_08-3.35.2 |
| SUSE Linux Enterprise Server 12-LTSS | xen | 4.4.4_34-22.71.2 |
| SUSE Linux Enterprise Server for SAP Applications 11 SP4 | xen | 4.4.4_34-61.32.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | xen | 4.5.5_24-22.52.3 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | xen | 4.7.6_02-43.36.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.2_08-3.35.2 |
| SUSE Linux Enterprise Software Development Kit 11 SP4 | xen | 4.4.4_34-61.32.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | xen | 4.9.2_08-3.35.2 |
| SUSE OpenStack Cloud 7 | xen | 4.7.6_02-43.36.1 |
| Ubuntu 16.04 LTS | xen | no fix |
| Ubuntu 18.04 LTS | xen | no fix |
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 |