CVE intelligence and bounded remediation
CVE-2021-21166 — Google Chromium Race Condition Vulnerability
High
CVSS 8.8
CISA KEV
Data race in audio in Google Chrome prior to 89.0.4389.72 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
- Severity
- High
- CVSS
- 8.8 (3.1)
- Published
- 2021-03-09
- CISA KEV
- Known exploited
- Ecosystem
- browser
- Weaknesses
- CWE-362
Affected products
- google / chrome
- fedoraproject / fedora / 32
- fedoraproject / fedora / 33
- fedoraproject / fedora / 34
- debian / debian_linux / 10.0
Matched remediation archetype
Race condition, TOCTOU, and lifecycle synchronization
This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.
Check exposure
- Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
- Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
- Identify clustered and multi-process behavior that repository-local tests may not represent.
Remediate safely
- Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
- Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
- Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.
Authoritative sources
Complete CVE record and remediation plan
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