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CVE-2021-30598

HIGH · 8.8 CVSS v3.1 Published 2021-08-26
Fix available
A fix is available. Upgrade to 92.0.4515.159 or later.
See remediation →
95/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Patch available

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 92.0.4515.159 allowed a remote attacker to execute arbitrary code inside a sandbox 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
How this class of weakness works · CWE-843

A resource is accessed as one type when it was actually allocated as another, so the code misreads memory layout — in interpreters and language runtimes this is frequently a direct path to code execution. It often arises from unchecked casts on attacker-influenced objects. The fix is strict type checks before casts and memory-safe access patterns.

General guidance for the type confusion class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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:< 92.0.4515.159
FedoraOperating system
Affected:= 33= 34= 35

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

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.

dbcve · scoped
Upgrade available Upgrade to 92.0.4515.159 or later
Fixed in 92.0.4515.159
Vendor patch crbug.com →
Recommended fix High confidence

Chrome 92.0.4515.159 or later (recommend latest stable release)

  1. Check current Chrome version by navigating to chrome://settings/help or running 'google-chrome --version' in terminal
  2. Update Chrome to version 92.0.4515.159 or later by: On Linux, run 'sudo dnf update google-chrome-stable' (Fedora) or 'sudo apt update && sudo apt upgrade google-chrome-stable' (Debian/Ubuntu)
  3. Alternatively, download the latest stable Chrome from https://www.google.com/chrome/ and reinstall
  4. Restart Chrome to apply the update
  5. Verify the version is 92.0.4515.159 or higher via chrome://settings/help
Caveat Minimal; Chrome auto-updates typically have no breaking changes for end users

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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-2021-30598 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