VDB
ALPINE-CVE-2020-11743
ALPINE-CVE-2020-11743
PUBLISHED
CVSS 5.5 MEDIUM
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.
Risk Scores
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.10 | xen | 0, 4.9.1-r3, 4.9.1-r2 |
| Alpine:v3.22 | xen | 4.1.2-r6, 4.0.1-r0, 4.0.1-r2 |
| Alpine:v3.8 | xen | 4.6.0-r1, 4.6.0-r2, 4.6.0-r3 |
| Alpine:v3.21 | xen | 4.9.0-r1, 4.8.1-r4, 4.8.1-r3 |
| Alpine:v3.12 | xen | 4.3.0-r0, 4.9.1-r3, 4.9.1-r2 |
| Alpine:v3.19 | xen | 4.9.1-r3, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.14 | xen | 4.9.1-r3, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.23 | xen | 4.7.1-r5, 4.9.1-r3, 4.9.1-r2 |
| Alpine:v3.17 | xen | 4.8.1-r4, 4.5.1-r1, 4.5.1-r0 |
| Alpine:v3.16 | xen | 4.4.1-r6, 0, 4.0.1-r0 |
| Alpine:v3.11 | xen | 4.9.1-r3, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.18 | xen | 4.9.1-r3, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.20 | xen | 4.6.1-r2, 4.9.1-r3, 4.9.1-r2 |
| Alpine:v3.15 | xen | 0, 4.0.1-r0, 4.0.1-r1 |
| Alpine:v3.13 | xen | 4.6.1-r2, 4.9.1-r2, 4.9.1-r1 |
| Alpine:v3.9 | xen | 0, 4.0.1-r1, 4.0.1-r2 |
Timeline
- Apr 14, 2020 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch