CVE intelligence and bounded remediation

CVE-2021-4055 — Google Chrome security vulnerability

High CVSS 8.8

Heap buffer overflow in extensions in Google Chrome prior to 96.0.4664.93 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension.

Severity
High
CVSS
8.8 (3.1)
Published
2021-12-23
CISA KEV
Not currently listed
Ecosystem
browser
Weaknesses
CWE-787

Affected products

  • google / chrome
  • fedoraproject / fedora / 34
  • debian / debian_linux / 10.0
  • debian / debian_linux / 11.0

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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