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CVE-2019-17343

21
FAUCET Score

CVE-2019-17343 is a vulnerability in Xen through version 4.11.x, affecting Debian and Xen products, where x86 PV guest OS users can exploit incorrect HVM physmap usage for PV domains. This allows for a denial of service or privilege escalation. With a CVSS score of 6.8 (Medium), it requires physical access to the system (AV:P) but has low attack complexity (AC:L), leading to high confidentiality, integrity, and availability impacts (C:H/I:H/A:H). Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.11.2CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 41st percentile among its peer group of 1,532 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 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-2019-17343Moderate

xen: xsa288: Inconsistent PV IOMMU discipline

Mar 5, 2019

References

seclists.org / bugtraq/2020/Jan/21
Mailing ListThird Party Advisory
debian.org / security/2020/dsa-4602
Third Party Advisory
xenbits.xen.org / xsa/advisory-288.html
Vendor Advisory
openwall.com / lists/oss-security/2019/10/25/10
Mailing ListThird Party Advisory
xenbits.xen.org / xsa/advisory-288.html
Vendor Advisory