CVE-2021-30597

Heap corruption via freed Browser UI object

Published Aug 26, 2021 · Updated Aug 3, 2024

Use-after-free in Google Chrome's Browser UI before 92.0.4515.131 allows physically proximate attackers to trigger heap corruption. The Browser UI accesses an object after its memory has been freed; Google has not published the affected function or trigger. Physical access to the device is required, and the published record does not establish code execution or a more specific outcome.

CVSS severity6.8
Medium
EPSS probability1.25%
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 Browser UI before 92.0.4515.131 allows physically proximate attackers to trigger heap corruption. The Browser UI accesses an object after its memory has been freed; Google has not published the affected function or trigger. Physical access to the device is required, and the published record does not establish code execution or a more specific outcome.

The record

CVE
CVE-2021-30597
Published
Aug 26, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 <92.0.4515.131

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <92.0.4515.131

Published CVSS scores

6.8NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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.

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No observations available

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

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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