The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP).
CVE-2014-8594
MEDIUMCVSS v2 · 5.45.4—
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.4 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:H/Au:N/C:N/I:N/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 2.2% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.
Sources: epss, nvd_v2
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2.2%CVSS v2: 5.4Exploit: None knownExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v2.0 (legacy)
- 5.4MEDIUMNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 5.4MEDIUMlow confidence
- EG Risk
- 30EG Risk 30/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity54% × 45%Exploitation2% × 40%Automatability30% × 15%CISA SSVC: Track at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 2.2%
- EPSS %ILE
- 82nd
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track or Track* or Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
November 19, 2014
Last Modified
May 6, 2026
References (16)
- cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- cve@mitrehttp://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- cve@mitrehttp://secunia.com/advisories/62672
- cve@mitrehttp://www.debian.org/security/2015/dsa-3140
- cve@mitrehttp://www.securityfocus.com/bid/71149
- cve@mitrehttp://xenbits.xen.org/xsa/advisory-109.html
- cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/98767
- cve@mitrehttps://security.gentoo.org/glsa/201504-04
- af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/62672
- af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3140
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/71149
- af854a3a-2127-422b-91ae-364da2661108http://xenbits.xen.org/xsa/advisory-109.html
- af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/98767
Vendor Advisories for CVE-2014-8594
Vendor advisories for this CVE are temporarily unavailable — the list could not be loaded just now. That is not a sign that none exist; please retry shortly.
Affected Packages
(5 across 5 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — | 4.4.1-4 (one range) | — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — | 4.4.1-4 (one range) | — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — | 4.4.1-4 (one range) | — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | — | 4.4.1-4 (one range) | — |
Debian:7(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| xen | 4.1.4-3, 4.1.4-3+deb7u1, 4.1.4-3+deb7u2, 4.1.4-3+deb7u3 | 4.1.4-3+deb7u4 (one range) | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Related CVEs(same product + same CWE)· as of October 5, 2026
Same product
10 shownDebian:7:xen
- CVE-2017-10921EG 10.0CRITICAL
- CVE-2017-10920EG 10.0CRITICAL
- CVE-2017-10918EG 10.0CRITICAL
- CVE-2017-10912EG 10.0CRITICAL
- CVE-2015-8104EG 10.0CRITICAL
- CVE-2016-9603NVD 5.5EG 9.9EPSS p91CRITICAL
- CVE-2017-2620NVD 5.5EG 9.9CRITICAL
- CVE-2017-10913EG 9.8CRITICAL
- CVE-2015-5165EG 9.3EPSS p96HIGH
- CVE-2017-10915EG 9.0CRITICAL
Frequently asked(4)
What is CVE-2014-8594?
CVE-2014-8594 is a medium vulnerability published on November 19, 2014. The dommuupdate function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging…
When was CVE-2014-8594 disclosed?
CVE-2014-8594 was first published on November 19, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-8594 actively exploited?
CVE-2014-8594 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.2% probability of exploitation in the next 30 days (82nd percentile of EPSS-scored CVEs).
How do I remediate CVE-2014-8594?
A fix for CVE-2014-8594 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2014-8594
Is Your Infrastructure Affected by CVE-2014-8594?
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