CVE-2020-6450Public exploitNetwork attack vector

Renderer heap corruption via stale WebAudio context

Published Apr 13, 2020 · Updated Aug 4, 2024

Use after free in WebAudio in Google Chrome before 80.0.3987.162 allows remote attackers to corrupt renderer heap memory via a crafted HTML page. An AudioHandler retained a garbage-collected BaseAudioContext and dereferenced it from a queued callback before destructor cleanup removed the stale relationship. A user must load the crafted page; exploitation remains inside the renderer sandbox unless combined with another flaw.

CVSS severity8.8
High
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use after free in WebAudio in Google Chrome before 80.0.3987.162 allows remote attackers to corrupt renderer heap memory via a crafted HTML page. An AudioHandler retained a garbage-collected BaseAudioContext and dereferenced it from a queued callback before destructor cleanup removed the stale relationship. A user must load the crafted page; exploitation remains inside the renderer sandbox unless combined with another flaw.

The record

CVE
CVE-2020-6450
Published
Apr 13, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <80.0.3987.162

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <80.0.3987.162

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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