CVE-2018-19963

HIGHNVD 7.8

7.8

An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because x86 IOREQ server resource accounting (for external emulators) was mishandled.

CVSS v3: 7.8
EG Score: —
EPSS: 16.1%
KEV: Not listed

Published

December 8, 2018

Last Modified

November 21, 2024

References (4)

cve@mitrehttp://www.securityfocus.com/bid/106182
cve@mitrehttps://xenbits.xen.org/xsa/advisory-276.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/106182
af854a3a-2127-422b-91ae-364da2661108https://xenbits.xen.org/xsa/advisory-276.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-617

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-19963?

CVE-2018-19963 is a high vulnerability published on December 8, 2018. An issue was discovered in Xen 4.11 allowing HVM guest OS users to cause a denial of service (host OS crash) or possibly gain host OS privileges because x86 IOREQ server resource accounting (for external emulators) was mishandled.

When was CVE-2018-19963 disclosed?

CVE-2018-19963 was first published in the National Vulnerability Database on December 8, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-19963 actively exploited?

CVE-2018-19963 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-19963?

CVE-2018-19963 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2018-19963?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19963, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-19963

📅 Published

🔄 Last Modified

🔗 References (4)