CVE-2020-11743
Fixed in a distro release EPSS <1%
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
Products: xen, fedoraproject fedora
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Alpine 3.10 | xen | 4.12.2-r1 |
| Alpine 3.11 | xen | 4.13.0-r1 |
| Alpine 3.12 | xen | 4.13.0-r3 |
| Alpine 3.13 | xen | 4.13.0-r3 |
| Alpine 3.14 | xen | 4.13.0-r3 |
| Alpine 3.15 | xen | 4.13.0-r3 |
| Alpine 3.16 | xen | 4.13.0-r3 |
| Alpine 3.17 | xen | 4.13.0-r3 |
| Alpine 3.18 | xen | 4.13.0-r3 |
| Alpine 3.19 | xen | 4.13.0-r3 |
| Alpine 3.20 | xen | 4.13.0-r3 |
| Alpine 3.21 | xen | 4.13.0-r3 |
| Alpine 3.22 | xen | 4.13.0-r3 |
| Alpine 3.23 | xen | 4.13.0-r3 |
| Alpine 3.24 | xen | 4.13.0-r3 |
| Alpine 3.8 | xen | 4.10.4-r3 |
| Alpine 3.9 | xen | 4.11.3-r2 |
| Debian 10 | xen | 4.11.4+24-gddaaccbbab-1~deb10u1 |
| Debian 12 | xen | 4.11.4-1 |
| Debian 13 | xen | 4.11.4-1 |
| Debian 14 | xen | 4.11.4-1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | xen | 4.12.2_04-3.15.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | xen | 4.12.2_04-3.15.1 |
| SUSE Linux Enterprise Server 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.2_04-3.11.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.2_04-3.11.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | xen | 4.10.4_10-3.31.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | xen | 4.11.3_04-2.23.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.2_04-3.11.1 |
| 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 15.1 | xen | 4.12.2_04-lp151.2.15.1 |
| openSUSE Tumbleweed | xen | 4.15.1_01-1.2 |