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CVE-2020-15965

HIGH · 8.8 CVSS v3.1 Published 2020-09-21
Fix available
A fix is available. Upgrade to 85.0.4183.121 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Type confusion in V8 in Google Chrome prior to 85.0.4183.121 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Type confusion vulnerability in V8 JavaScript engine in Google Chrome versions prior to 85.0.4183.121 allows remote attackers to potentially perform out of bounds memory access through malicious HTML pages.

MitigationUpdate Google Chrome to version 85.0.4183.121 or later to patch the V8 type confusion vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ChromeWeb browser
Affected:< 85.0.4183.121
Debian LinuxOperating system
Affected:= 10.0
FedoraOperating system
Affected:= 31= 32= 33
Backports SleApplication
Affected:= 15.0
LeapOperating system
Affected:= 15.1= 15.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Google Chrome version
    Open Chrome, click the three-dot menu, go to Help > About Google Chrome. Alternatively, navigate to chrome://settings/help in the address bar.
    Affected if The displayed version number is less than 85.0.4183.121
  2. Check Chromium version on Debian
    Run 'dpkg -l | grep chromium' or 'apt show chromium' in terminal to see the installed Chromium package version.
    Affected if The installed version is lower than 85.0.4183.121-1~deb10u1 or the package version indicates a build before August 2020
  3. Check Chromium version on Fedora
    Run 'dnf list installed chromium' or 'rpm -qa | grep chromium' in terminal.
    Affected if The installed version is earlier than the version that patched this CVE (typically versions released before August 2020)
  4. Check Chromium version on openSUSE
    Run 'rpm -qi chromium' or 'zypper info chromium' in terminal.
    Affected if The installed version is earlier than the patched version for Leap 15.1/15.2 or Backports SLE 15.0

You are affected if your installed Google Chrome or Chromium browser version is lower than 85.0.4183.121, as this is the version that patched the V8 type confusion vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 85.0.4183.121 or later
Fixed in 85.0.4183.121
Interim mitigation

Update Google Chrome to version 85.0.4183.121 or later to patch the V8 type confusion vulnerability.

Fix this in Chrome Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-15965 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data