CVE-2021-28705 is a high-severity vulnerability (CVSS 7.8) affecting Xen hypervisors, specifically impacting x86 HVM and PVH guests running on Debian and Fedora. It stems from insufficient error handling during page removal operations in populate-on-demand (PoD) mode, where partial success of memory operations is not properly accounted for. This local vulnerability allows an attacker with low privileges to achieve high impact on confidentiality, integrity, and availability. There is currently no known active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.4.0, <= 4.12.4CPE matchmatch criteria | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | ||
>= 4.13.0, <= 4.13.4CPE matchmatch criteria | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | ||
>= 4.14.0, <= 4.14.3CPE matchmatch criteria | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* | ||
4.15.0CPE matchmatch criteria | cpe:2.3:o:xen:xen:4.15.0:*:*:*:*:*:x86:* | ||
4.15.1CPE matchmatch criteria | cpe:2.3:o:xen:xen:4.15.1:*:*:*:*:*:x86:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.