CVE-2017-12136

Race condition in the grant table code in Xen 4.6.x through 4.9.x allows local guest OS administrators to cause a denial of service (free list corruption and host crash) or gain privileges on the host via vectors involving maptrack free list handling.

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-2017-12136 is rated Low Risk (33.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.03%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

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-2017-12136

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 2026-04-19 0.06% 0.03% -0.04%
2 2023-03-07 1.10% 0.06% -1.04%
3 2022-02-04 — 1.10% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-12136

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.0 HIGH
CVSS:3.0/AV:L/AC:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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.
 1.1 6.0 [email protected]
6.9 2.0 MEDIUM
AV:L/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2017-12136

OS Trackers for CVE-2017-12136

vendor priority summary link
alpine — CVE-2017-12136: 1 source package rows (xen); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2017-12136
debian not yet assigned CVE-2017-12136 not yet assigned priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-12136
gentoo high CVE-2017-12136: 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-2017-12136
redhat high — https://access.redhat.com/security/cve/CVE-2017-12136
suse high — https://www.suse.com/security/cve/CVE-2017-12136/
ubuntu medium CVE-2017-12136 medium priority: Ubuntu including 1 source packages (xen), 4 status rows across 4 suites (trusty, upstream, xenial, zesty): released 2, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2017-12136

Affected software / configurations for CVE-2017-12136

Vendor Product Version Raw CPE
xen xen 4.6.0 cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*
xen xen 4.6.1 cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*
xen xen 4.6.3 cpe:2.3:o:xen:xen:4.6.3:*:*:*:*:*:*:*
xen xen 4.6.4 cpe:2.3:o:xen:xen:4.6.4:*:*:*:*:*:*:*
xen xen 4.6.5 cpe:2.3:o:xen:xen:4.6.5:*:*:*:*:*:*:*
xen xen 4.6.6 cpe:2.3:o:xen:xen:4.6.6:*:*:*:*:*:*:*
xen xen 4.7.0 cpe:2.3:o:xen:xen:4.7.0:*:*:*:*:*:*:*
xen xen 4.7.1 cpe:2.3:o:xen:xen:4.7.1:*:*:*:*:*:*:*
xen xen 4.7.2 cpe:2.3:o:xen:xen:4.7.2:*:*:*:*:*:*:*
xen xen 4.7.3 cpe:2.3:o:xen:xen:4.7.3:*:*:*:*:*:*:*
xen xen 4.8.0 cpe:2.3:o:xen:xen:4.8.0:*:*:*:*:*:*:*
xen xen 4.8.1 cpe:2.3:o:xen:xen:4.8.1:*:*:*:*:*:*:*
xen xen 4.9.0 cpe:2.3:o:xen:xen:4.9.0:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2017-12136

URL Tags
http://www.debian.org/security/2017/dsa-3969 Third Party Advisory
http://www.openwall.com/lists/oss-security/2017/08/15/3 Mailing List Patch Third Party Advisory
http://www.securityfocus.com/bid/100346 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039175 Third Party Advisory VDB Entry
http://xenbits.xen.org/xsa/advisory-228.html Patch Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1477651 Issue Tracking Patch Third Party Advisory
https://security.gentoo.org/glsa/201801-14 Third Party Advisory
https://support.citrix.com/article/CTX225941 Patch Third Party Advisory
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