CVE-2018-19961

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
33.4%
KEV
Not listed

Published

December 8, 2018

Last Modified

November 21, 2024

References (14)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:15 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
  4. 2026-07-21 01:47 UTCOSV refresh
  5. 2026-07-20 17:04 UTCEPSS rescore
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  1. 2026-07-06 02:20 UTCEPSS rescore
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  5. 2026-07-03 20:56 UTCOSV refresh
  6. 2026-07-02 16:54 UTCEPSS rescore
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  38. 2026-06-15 09:13 UTCOSV refresh
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  44. 2026-06-11 13:57 UTCEPSS rescore
  45. 2026-06-10 22:16 UTCEPSS rescore
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  49. 2026-06-07 15:22 UTCEPSS rescore
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  67. 2026-05-28 00:28 UTCEG score recompute
  68. 2026-05-28 00:27 UTCGHSA enrichment
  69. 2026-05-27 13:38 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-19961?
CVE-2018-19961 is a high vulnerability published on December 8, 2018. An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.
When was CVE-2018-19961 disclosed?
CVE-2018-19961 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-2018-19961 actively exploited?
CVE-2018-19961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-19961?
CVE-2018-19961 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2018-19961?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19961, 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.

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