CVE-2024-3864Network attack vector

Remote code execution via graphics double-free

Published Apr 16, 2024 · Updated Mar 28, 2025

Double-free in Mozilla Firefox before 125, Firefox ESR before 115.10, and Thunderbird before 115.10 allows remote attackers to execute code. DrawTargetSkia::Mask releases a transient Skia shader reference twice while WebGL canvas graphics are rasterized, leaving SkRefCntBase::unref to access freed memory. Crafted graphics content can therefore crash the application or enable code execution without authentication or user interaction.

CVSS severity8.1
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double-free in Mozilla Firefox before 125, Firefox ESR before 115.10, and Thunderbird before 115.10 allows remote attackers to execute code. DrawTargetSkia::Mask releases a transient Skia shader reference twice while WebGL canvas graphics are rasterized, leaving SkRefCntBase::unref to access freed memory. Crafted graphics content can therefore crash the application or enable code execution without authentication or user interaction.

The record

CVE
CVE-2024-3864
Published
Apr 16, 2024
Updated
Mar 28, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=124
  2. Affected versionversion=unspecified <125

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <=124; version=unspecified <125
Mozilla · Thunderbirdversion=0 <=115.9; version=unspecified <115.10
Mozilla · Firefox ESRversion=0 <=115.9; version=unspecified <115.10

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo