CVE-2022-40961Network attack vector

Startup crash via unterminated driver-version fields

Published Dec 22, 2022 · Updated Apr 15, 2025

Stack-buffer overflow in Firefox for Android before 105 allows attackers to crash the browser during graphics initialization. GfxInfo::EnsureInitialized passes fixed-size fields left without null terminators by SplitDriverVersion to atoi when the reported version has fewer than four dot-separated numbers. The fault occurs at startup on affected Android devices, but Mozilla noted no practical attacker control over the device-supplied version string, bounding the demonstrated impact to a browser crash.

CVSS severity6.5
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-buffer overflow in Firefox for Android before 105 allows attackers to crash the browser during graphics initialization. GfxInfo::EnsureInitialized passes fixed-size fields left without null terminators by SplitDriverVersion to atoi when the reported version has fewer than four dot-separated numbers. The fault occurs at startup on affected Android devices, but Mozilla noted no practical attacker control over the device-supplied version string, bounding the demonstrated impact to a browser crash.

The record

CVE
CVE-2022-40961
Published
Dec 22, 2022
Updated
Apr 15, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-787
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

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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 <105

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <105

Published CVSS scores

6.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.

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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-787Out-of-bounds Write

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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