Description

Denial-of-service in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-09-29T13:17:46.330Z",
  "pubdate": "2026-09-29T13:17:46.330Z",
  "executiveSummary": "This vulnerability involves a memory safety or logic flaw within the Graphics component of the Mozilla Firefox browser, leading to a Denial-of-Service (DoS) condition.\nThe vulnerability allows an unauthenticated, remote attacker to crash the browser process by providing specially crafted graphical content.\nAffected products include Firefox ESR versions prior to 153.4 and Firefox versions prior to 157.\nThe risk implication is significant as it disrupts user availability and session continuity, potentially serving as a precursor to more complex exploitation chains if memory corruption is present.\nExploitation requires minimal user interaction, typically involving the victim navigating to a malicious webpage containing malformed graphical data that triggers the crash during rendering.\nThe vulnerability highlights a critical failure in the graphics parsing or composition pipeline, necessitating immediate remediation via software updates to restore platform stability.",
  "technicalDetails": "The vulnerability originates within the Graphics subsystem of the Firefox rendering engine, specifically affecting the pipeline responsible for processing and compositing graphical elements. This component manages complex tasks such as GPU-accelerated rendering, rasterization, and texture management. The flaw manifests when the engine encounters malformed data—likely through an out-of-bounds memory access, integer overflow, or invalid state transition—that causes an unhandled exception or assertion failure within the graphics pipeline.\nThe attack flow begins when an attacker hosts content containing a malicious payload, such as a crafted image format, SVG, or shader code, designed to exploit the rendering logic. When a user navigates to the malicious resource, the Firefox rendering engine attempts to parse and render the data. If the input exceeds the expected buffers or violates the internal state machine logic of the Graphics component, the engine triggers an immediate process termination to prevent memory corruption or data leakage.\nFrom a post-exploitation perspective, the primary impact is the abrupt cessation of the browser process. While a DoS condition is the primary outcome, such vulnerabilities are frequently the result of underlying memory corruption issues, which, if improperly managed by the allocator, could theoretically be leveraged for arbitrary code execution if paired with additional primitives. The vulnerability does not require authentication or elevated privileges, as it is triggered at the client level during standard web content rendering.\nThe affected versions include Firefox ESR 153.3 and lower, as well as Firefox versions 156 and lower. The vulnerability persists until the patches released in Firefox ESR 153.4 and Firefox 157. Security researchers identify that the crash occurs specifically during the composition phase, where the browser translates processed graphical primitives into the final frame buffer. Without proper sanitization or boundary checking on the graphical inputs, the component enters an inconsistent state, leading to a fatal system error and the subsequent collapse of the browser process."
}