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CVE-2017-10920

25
FAUCET Score

CVE-2017-10920 is a critical vulnerability affecting Xen through version 4.8.x, stemming from improper handling of grant-table mappings (GNTMAP_device_map and GNTMAP_host_map). This flaw allows guest OS users to trigger a denial of service through memory corruption or potentially gain privileged host OS access. With a CVSS score of 10.0, it is easily exploitable over the network with low complexity, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.8.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

10.0CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.55%
Probability of exploitation in next 30 days
EPSS Percentile
83.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0255 is in the 74th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media 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

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: xen

Vendor Advisories (1)

redhatCVE-2017-10920Important

xen: grant table operations mishandle reference counts (XSA-224)

Jun 20, 2017

References

security.gentoo.org / glsa/201708-03
security.gentoo.org / glsa/201710-17
xenbits.xen.org / xsa/advisory-224.html
PatchVendor Advisory
debian.org / security/2017/dsa-3969
securitytracker.com / id/1038734