CVE-2024-2886Known exploitationNetwork attack vector

Renderer code execution via WebCodecs use-after-free

Published Mar 26, 2024 · Updated Mar 22, 2025

Use-after-free in Google Chrome WebCodecs before 123.0.6312.86 allows remote attackers to execute code via a crafted HTML page. The WebCodecs implementation accesses an object after its storage is freed; Google has not published the affected function or precise lifetime error. A user must load attacker-controlled HTML, and demonstrated exploitation reaches code execution inside the browser renderer sandbox.

CVSS severity7.5
High
EPSS probability1.76%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Google Chrome WebCodecs before 123.0.6312.86 allows remote attackers to execute code via a crafted HTML page. The WebCodecs implementation accesses an object after its storage is freed; Google has not published the affected function or precise lifetime error. A user must load attacker-controlled HTML, and demonstrated exploitation reaches code execution inside the browser renderer sandbox.

The record

CVE
CVE-2024-2886
Published
Mar 26, 2024
Updated
Mar 22, 2025
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2024Exploitation reportedPwn2Own Vancouver 2024 Chrome renderer exploit demonstration
  2. Mar 26, 2024CVE publishedPublication date reported by the CVE source.
  3. Mar 22, 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=40 <1.fc40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fedora Project · Fedora Linuxversion=40 <1.fc40
Google Cloud · Google Chromeversion=0 <123.0.6312.86; version=123.0.6312.86 <123.0.6312.86

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:H/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 exploitationReported
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.

Reported exploitation

Technologies

Your stack

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Your stack

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