CVE-2020-10766

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 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
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
37.5%
KEV
Not listed

Published

September 15, 2020

Last Modified

November 21, 2024

References (4)

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-oracle (4.15.0.1051.42) @ xenial2026-05-23ubuntu
ubuntulinux-image-virtual-lts-xenial (4.4.0.186.192) @ xenial2026-05-23ubuntu
ubuntulinux-image-oem-osp1 (5.0.0.1065.63) @ bionic2026-05-23ubuntu
ubuntulinux-image-virtual-hwe-20.04 (5.4.0.45.49) @ focal2026-05-23ubuntu
ubuntulinux-image-raspi2-hwe-18.04 (5.3.0.1030.20) @ bionic2026-05-23ubuntu
redhatkpatch-patch2020-08-04redhat
redhatkernel-0:4.18.0-147.24.2.el8_12020-07-29redhat
redhatkernel-rt-0:4.18.0-193.13.2.rt13.65.el8_22020-07-21redhat
redhatkernel-0:4.18.0-193.13.2.el8_22020-07-21redhat
redhatkernel-0:4.18.0-80.27.1.el8_02020-07-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(12)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 45× 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 101 total refreshes for this CVE.

  1. 2026-07-23 01:48 UTCEG score recompute
  2. 2026-07-22 22:32 UTCEG score recompute
  3. 2026-07-22 14:05 UTCEPSS rescore
  4. 2026-07-21 15:22 UTCEPSS rescore
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  45. 2026-06-08 14:15 UTCEPSS rescore
  46. 2026-06-08 14:15 UTCEPSS rescore
  47. 2026-06-07 17:16 UTCOSV refresh
  48. 2026-06-07 15:23 UTCEPSS rescore
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  50. 2026-06-06 13:45 UTCEPSS rescore
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  74. 2026-05-23 07:47 UTCEG score recompute
  75. 2026-05-23 07:47 UTCVendor advisory

Frequently asked(5)

What is CVE-2020-10766?
CVE-2020-10766 is a medium vulnerability published on September 15, 2020. A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced…
When was CVE-2020-10766 disclosed?
CVE-2020-10766 was first published in the National Vulnerability Database on September 15, 2020, 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-2020-10766 actively exploited?
CVE-2020-10766 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-10766?
CVE-2020-10766 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2020-10766?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-10766, 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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