CVE-2017-12134

The xen_biovec_phys_mergeable function in drivers/xen/biomerge.c in Xen might allow local OS guest users to corrupt block device data streams and consequently obtain sensitive memory information, cause a denial of service, or gain host OS privileges by leveraging incorrect block IO merge-ability calculation.

Published: 2017-08-24 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-12134 is rated Moderate Risk (48.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-12134

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.29% 0.50% +0.21%
2 2025-06-19 0.18% 0.29% +0.10%
3 2025-04-21 — 0.18% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-12134

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.0 6.0 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2017-12134

OS Trackers for CVE-2017-12134

vendor priority summary link
debian not yet assigned CVE-2017-12134 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-12134
gentoo high CVE-2017-12134: 1 GLSA(s) (201801-14), 2 atom(s) (app-emulation/xen, app-emulation/xen-tools); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-12134
redhat medium — https://access.redhat.com/security/cve/CVE-2017-12134
suse high CVE-2017-12134 severity important: SUSE including 57 source package names (cluster-md-kmp-default-4.4.90-92.45.1, cluster-md-kmp-default-4.4.92-6.18.1, …), 165 product×package rows across 44 product lines (SUSE CaaS Platform 4.5, SUSE Enterprise Storage 7, … (44 product lines)): Known Not Affected 83, Fixed 82. https://www.suse.com/security/cve/CVE-2017-12134/
ubuntu medium CVE-2017-12134 medium priority: Ubuntu including 79 source packages (linux, linux-aws, …), 654 status rows across 11 suites (artful, bionic, cosmic, focal, jammy, noble, oracular, trusty, upstream, xenial, zesty): DNE 425, not-affected 124, released 93, ignored 12. https://ubuntu.com/security/CVE-2017-12134

Affected software / configurations for CVE-2017-12134

Vendor Product Version Raw CPE
xen xen — cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*
citrix xenserver 6.0.2 cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:*
citrix xenserver 6.2.0 cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:*
citrix xenserver 6.5 cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:*
citrix xenserver 7.0 cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:*
citrix xenserver 7.1 cpe:2.3:a:citrix:xenserver:7.1:*:*:*:*:*:*:*
citrix xenserver 7.2 cpe:2.3:a:citrix:xenserver:7.2:*:*:*:*:*:*:*

References for CVE-2017-12134

cvelogic Threat Intelligence