CVE-2022-46882Public exploitNetwork attack vector

Application crash via stale WebGL extension reference

Published Dec 22, 2022 · Updated Apr 15, 2025

Use-after-free in Mozilla Firefox before 107, Firefox ESR before 102.6, and Thunderbird before 102.6 allows remote attackers to crash the application. ClientWebGLContext::GetExtension failed to retain a strong mNotLost reference while processing repeated OES_vertex_array_object requests after memory exhaustion, then dereferenced freed storage. Reaching the crash requires attacker-controlled WebGL content, repeated extension queries, and severe 32-bit address-space pressure; Thunderbird disables scripting in email, limiting exposure to browser-like contexts.

CVSS severity9.8
Critical
EPSS probability0.92%
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

Use-after-free in Mozilla Firefox before 107, Firefox ESR before 102.6, and Thunderbird before 102.6 allows remote attackers to crash the application. ClientWebGLContext::GetExtension failed to retain a strong mNotLost reference while processing repeated OES_vertex_array_object requests after memory exhaustion, then dereferenced freed storage. Reaching the crash requires attacker-controlled WebGL content, repeated extension queries, and severe 32-bit address-space pressure; Thunderbird disables scripting in email, limiting exposure to browser-like contexts.

The record

CVE
CVE-2022-46882
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-416, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=unspecified <107

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <107
Mozilla · Thunderbirdversion=unspecified <102.6
Mozilla · Firefox ESRversion=unspecified <102.6

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

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