CVE-2023-2934Public exploitNetwork attack vector

Heap corruption via mutable Mojo IPC messages

Published May 30, 2023 · Updated May 5, 2025

Out-of-bounds memory access in Google Chrome before 114.0.5735.90 allows remote attackers to corrupt the heap via crafted HTML. During Mojo IPC deserialization, core_ipcz exposes message contents in shared memory even though validators assume that the bytes cannot change. A user must open the crafted page; concurrent message mutation can bypass validation and cause out-of-bounds access that corrupts the browser heap.

CVSS severity8.8
High
EPSS probability1.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in Google Chrome before 114.0.5735.90 allows remote attackers to corrupt the heap via crafted HTML. During Mojo IPC deserialization, core_ipcz exposes message contents in shared memory even though validators assume that the bytes cannot change. A user must open the crafted page; concurrent message mutation can bypass validation and cause out-of-bounds access that corrupts the browser heap.

The record

CVE
CVE-2023-2934
Published
May 30, 2023
Updated
May 5, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-787, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 2025Record 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=114.0.5735.90 <114.0.5735.90

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=114.0.5735.90 <114.0.5735.90

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS: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-787Out-of-bounds Write
T1189Drive-by Compromise

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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