CVE-2022-2478Network attack vector

Heap corruption via PDF object use-after-free

Published Jul 28, 2022 · Updated Aug 3, 2024

Use-after-free in Google Chrome's PDF component before 103.0.5060.134 allows remote attackers to corrupt heap memory through crafted HTML. The PDF renderer accesses memory after its owning object has been freed, but Google has not disclosed the object, function, or lifetime transition. A user must load attacker-controlled content; the public record establishes heap corruption but not sandbox escape or code execution.

CVSS severity8.8
High
EPSS probability0.85%
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 PDF component before 103.0.5060.134 allows remote attackers to corrupt heap memory through crafted HTML. The PDF renderer accesses memory after its owning object has been freed, but Google has not disclosed the object, function, or lifetime transition. A user must load attacker-controlled content; the public record establishes heap corruption but not sandbox escape or code execution.

The record

CVE
CVE-2022-2478
Published
Jul 28, 2022
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2022CVE 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 <103.0.5060.134

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=unspecified <103.0.5060.134

Published CVSS scores

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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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