Description

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

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-08-18T13:17:36.023Z",
  "pubdate": "2026-08-18T13:17:36.023Z",
  "executiveSummary": "An integer overflow vulnerability exists within the Graphics component of the Firefox browser. This security flaw introduces significant risk implications, potentially allowing malicious actors to induce memory corruption conditions. The affected systems include Firefox prior to version 154 and Firefox ESR prior to version 153.1. Successful exploitation of this vulnerability could lead to arbitrary code execution or application crashes, compromising the integrity and availability of the browser process. Attacker capabilities rely on inducing the victim to process malicious content, such as crafted graphical data, through the vulnerable Graphics component. While specific authentication or privilege requirements are not explicitly detailed beyond standard browser execution contexts, the presence of the flaw in a core rendering and graphics pipeline necessitates prompt remediation to prevent compromise.",
  "technicalDetails": "The vulnerability is rooted in an integer overflow condition within the Graphics component of Firefox. Integer overflows occur when arithmetic operations result in a value that exceeds the maximum storage capacity of the designated integer type, typically leading to unexpected wrap-around behavior. In the context of graphics rendering engines, such mathematical miscalculations frequently occur during size or offset calculations associated with memory allocation for image buffers, vertex data, or pixel arrays. When an attacker supplies maliciously crafted graphical data containing dimension parameters or payload lengths designed to trigger the overflow, the underlying memory allocation routine may reserve a buffer significantly smaller than required. Consequently, subsequent write operations into this undersized buffer result in heap-based or stack-based buffer overflows. The attack flow generally proceeds as follows: an attacker delivers malicious content containing specially manipulated graphics payloads via a web page or network resource. When the browser's Graphics component parses and processes this input, the vulnerable arithmetic operation executes, triggering the integer overflow. The resulting incorrect allocation size facilitates out-of-bounds memory writes when data is populated into the buffer. Depending on the memory layout and heap architecture, this memory corruption can overwrite adjacent critical data structures, function pointers, or control flow data. The vulnerable component is strictly confined to the Graphics subsystem of Firefox, affecting versions prior to Firefox 154 and Firefox ESR 153.1. Network exposure is present implicitly through the web-facing nature of the browser, as rendering engines process untrusted data originating from remote sources. Exploitation generally requires user interaction, specifically navigating to a malicious website or rendering malicious graphical content."
}