CVE-2020-6428Public exploitNetwork attack vector

Heap corruption via premature audio handler deletion

Published Mar 20, 2020 · Updated Aug 4, 2024

Use-after-free in Google Chrome's WebAudio renderer before 80.0.3987.149 allows remote attackers to corrupt heap memory via crafted HTML. DeferredTaskHandler::BreakConnections erases a finished AudioScheduledSourceHandler from its owning set, deleting it, then calls BreakConnectionWithLock through the freed pointer. A user must load the crafted page, and the published analysis demonstrates renderer use-after-free rather than a sandbox escape.

CVSS severity8.8
High
EPSS probability2.31%
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 Google Chrome's WebAudio renderer before 80.0.3987.149 allows remote attackers to corrupt heap memory via crafted HTML. DeferredTaskHandler::BreakConnections erases a finished AudioScheduledSourceHandler from its owning set, deleting it, then calls BreakConnectionWithLock through the freed pointer. A user must load the crafted page, and the published analysis demonstrates renderer use-after-free rather than a sandbox escape.

The record

CVE
CVE-2020-6428
Published
Mar 20, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 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 <80.0.3987.149

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <80.0.3987.149

Published CVSS scores

6.8NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:P/I:P/A:P
8.8NIST National Vulnerability DatabaseCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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