CVE-2020-15565 is a high-severity vulnerability in Xen through 4.13.x, specifically affecting x86 Intel HVM guest OS users. It stems from insufficient cache write-back under VT-d when page tables are shared between IOMMU and CPU, potentially allowing a malicious guest to retain read/write DMA access to Xen's free memory pool. This can lead to a host OS denial of service or privilege escalation. The vulnerability has a CVSS score of 8.8 (HIGH) due to its low attack complexity and significant impact on confidentiality, integrity, and availability. There is currently no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.2.0, <= 4.13.1CPE matchmatch criteria | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
31CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | ||
32CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | ||
15.1CPE matchmatch criteria | cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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