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ChromeWeb browser · Google

CVE-2020-6458

HIGH · 8.8 CVSS v3.1 Published 2020-05-21
Fix available
A fix is available. Upgrade to 81.0.4044.122 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
Out of bounds read and write in PDFium in Google Chrome prior to 81.0.4044.122 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file.

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

Out-of-bounds memory read and write vulnerability in PDFium (Google's PDF rendering library) in Chrome versions prior to 81.0.4044.122 allows a remote attacker to corrupt heap memory by tricking users into opening a specially crafted malicious PDF file, potentially leading to arbitrary code execution.

MitigationUpdate Google Chrome to version 81.0.4044.122 or later. Until patched, advise users not to open PDF files from untrusted sources.

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:< 81.0.4044.122
Debian LinuxOperating system
Affected:= 9.0= 10.0

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, go to Menu > Help > About Google Chrome, or navigate to chrome://settings/help
    Affected if Version displayed is earlier than 81.0.4044.122
  2. Check Chrome version from command line
    On Linux: google-chrome --version or /usr/bin/google-chrome --version. On Windows: Run 'reg query "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Google Chrome" /v Version' or check via PowerShell
    Affected if Version number is less than 81.0.4044.122
  3. Check for Chromium on Debian systems
    Run 'dpkg -l | grep -i chromium' or 'dpkg -l | grep -i chrome' to list installed browser packages
    Affected if Any chromium-browser, chromium, or google-chrome package is installed with version below 81.0.4044.122-1 (Debian packaging)
  4. Identify PDF rendering component
    Confirm PDFium is in use: Navigate to chrome://components in Chrome browser and look for PDFium entry
    Affected if PDFium component is present (vulnerable attack surface exists)

You are affected if you are running Google Chrome or a Chromium-based browser on Debian versions 9.0 or 10.0 with a version number lower than 81.0.4044.122 and users can view PDF files in the browser.

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 81.0.4044.122 or later
Fixed in 81.0.4044.122
Interim mitigation

Update Google Chrome to version 81.0.4044.122 or later. Until patched, advise users not to open PDF files from untrusted sources.

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-2020-6458 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