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CVE-2018-12892

30
FAUCET Score

CVE-2018-12892 is a critical vulnerability in Xen versions 4.7 through 4.10.x, specifically affecting systems using qemu-xen and libxl-based toolstacks. It allows malicious guest administrators to write to supposedly read-only SCSI disk images due to an erroneous merge conflict resolution in libxl. The vulnerability has a CVSS score of 9.9 (CRITICAL) with an attack vector of Network and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
>= 4.7.0, <= 4.10.1CPE matchmatch criteria
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.9CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.1
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 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0255 is in the 86th percentile among its peer group of 1,128 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 1.0 Bluesky, 0.5 Mastodon, and 1.6 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 Advisories (1)

redhatCVE-2018-12892Moderate

xen: libxl fails to honour readonly flag on HVM emulated SCSI disks

Jun 27, 2018

References

security.gentoo.org / glsa/201810-06
Third Party Advisory
debian.org / security/2018/dsa-4236
Third Party Advisory
openwall.com / lists/oss-security/2018/06/27/12
Mailing ListThird Party Advisory
securityfocus.com / bid/104571
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041203
Third Party AdvisoryVDB Entry
xenbits.xen.org / xsa/advisory-266.html
Vendor Advisory