CVE-2026-74964

Analyzed Analyzed - Analysis Complete

Integer Overflow in Firefox Graphics Component

Publication date: 2026-08-18

Last updated on: 2026-08-19

Assigner: Mozilla Corporation

Description

Integer overflow in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-18

Last Modified

2026-08-19

Generated

2026-09-08

AI Q&A

2026-08-18

EPSS Evaluated

2026-09-06

NVD

CVE-2026-74964

EUVD

EUVD-2026-60662

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	From 141.0 (inc) to 153.1.0 (exc)
mozilla	thunderbird	to 140.14.0 (exc)
mozilla	firefox	to 140.14.0 (exc)
mozilla	firefox	From 141.0.0 (inc) to 153.1.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This is an integer overflow vulnerability in Firefox's Graphics component. An integer overflow occurs when a calculation produces a result larger than the maximum value that can be stored in the data type, potentially leading to unexpected behavior or crashes.

Detection Guidance

This vulnerability is specific to Firefox versions before 154, Firefox ESR 140.14, and Firefox ESR 153.1. Detection involves checking installed Firefox versions. Use commands like 'firefox --version' or 'apt list --installed | grep firefox' on Linux. Compare versions against the fixed releases.

Impact Analysis

An attacker could exploit this to cause application crashes or execute arbitrary code. Users of affected Firefox versions may experience system instability or security breaches if the vulnerability is exploited.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. Without additional context on data exposure or processing impacts, its compliance implications cannot be determined.

Mitigation Strategies

Update Firefox to version 154 or later, Firefox ESR to version 140.14 or later, or Firefox ESR to version 153.1 or later to address the integer overflow in the Graphics component.

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