CVE-2018-20855

LOWNVD 3.33.3—
EchelonGraph scoreMEDIUM confidence

This low-severity CVE scores 3.3 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
3.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.3Exploit: None knownExposed: 0

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

An issue was discovered in the Linux kernel before 4.18.7. In create_qp_common in drivers/infiniband/hw/mlx5/qp.c, mlx5_ib_create_qp_resp was never initialized, resulting in a leak of stack memory to userspace.

CVSS v3
3.3
EG Score
3.3(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: Track

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 computed
Severity33% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

July 26, 2019

Last Modified

November 21, 2024

References (12)

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux—4.18.8-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux—4.18.8-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux—4.18.8-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux—4.18.8-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 30× 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.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
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  1. 2026-07-24 14:14 UTCEPSS rescore
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  3. 2026-07-23 14:15 UTCEPSS rescore
  4. 2026-07-23 01:35 UTCEG score recompute
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  6. 2026-07-22 14:05 UTCEPSS rescore
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  22. 2026-07-12 20:07 UTCOSV refresh
  23. 2026-07-12 05:43 UTCEPSS rescore
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  25. 2026-07-09 19:06 UTCEPSS rescore
  26. 2026-07-08 15:11 UTCEPSS rescore
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  48. 2026-06-24 14:02 UTCEPSS rescore
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  50. 2026-06-24 05:29 UTCOSV refresh
  51. 2026-06-23 21:30 UTCEPSS rescore
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  73. 2026-06-11 13:57 UTCEPSS rescore
  74. 2026-06-10 22:16 UTCEPSS rescore
  75. 2026-06-10 13:19 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2018-20855?
CVE-2018-20855 is a low vulnerability published on July 26, 2019. An issue was discovered in the Linux kernel before 4.18.7. In createqpcommon in drivers/infiniband/hw/mlx5/qp.c, mlx5ibcreateqpresp was never initialized, resulting in a leak of stack memory to userspace.
When was CVE-2018-20855 disclosed?
CVE-2018-20855 was first published in the National Vulnerability Database on July 26, 2019, 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-2018-20855 actively exploited?
CVE-2018-20855 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 62.4% of all scored CVEs.
What is the CVSS score of CVE-2018-20855?
CVE-2018-20855 has a CVSS v3 base score of 3.3 (NVD).
How do I remediate CVE-2018-20855?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20855, 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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