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Weekly Signal
Live intelligence Updated 19 Aug 2026 · 20:27 UTC

Debian, Fedoraproject, Google +1 more · Debian Linux, Fedora, Chrome +4 more

CVE-2020-6418

Google Chromium V8 Type Confusion Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Debian Security advisory Dsa 4638

View response plan
CVSS8.8
EPSS78.8%
KEVYes
ExploitationConfirmed exploitation
RemediationExplicit patch identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 78.8%; technical severity is CVSS 8.8.

Type confusion in V8 in Google Chrome prior to 80.0.3987.122 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Who should care

  • Teams operating Debian Linux, Fedora, Chrome +4 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Debian Linux, Fedora, Chrome +4 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Debian Security advisory Dsa 4638
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Patch

Upgrade

Advisory

Required Action

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-843
Affected versions
Debian Debian Linux (Version 9.0 | Version 10.0); Fedoraproject Fedora (Version 30 | Version 31); Google Chrome (End Excluding 80.0.3987.122); Google Chromium V8; Redhat Enterprise Linux Desktop (Version 6.0); Redhat Enterprise Linux Server (Version 6.0); Redhat Enterprise Linux Workstation (Version 6.0)
Fixed versions
Google Chrome (Fixed from 80.0.3987.122)
Published
27 February 2020
Attack vector
Network
Privileges required
None
User interaction
Required

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 78.8%
  4. Signal calculated at 82

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.