Description

Uninitialized Use in GPU in Google Chrome on Android prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-08-06T22:16:56.770Z",
  "pubdate": "2026-08-06T22:16:56.770Z",
  "executiveSummary": "An uninitialized use vulnerability exists within the GPU component of Google Chrome on Android prior to version 151.0.7922.109. This security flaw enables a remote attacker who has already successfully compromised the renderer process to extract potentially sensitive information residing in process memory.\nClassified with a Chromium security severity of High, this vulnerability poses significant risk to user data confidentiality. The primary impact is unauthorized memory disclosure, which can expose sensitive heap data or internal state details across process boundaries.\nExploitation requires the attacker to supply a crafted HTML page to lure a victim into rendering malicious web content. This attack vector assumes the adversary has already achieved execution within the restricted renderer sandbox, leveraging the GPU process interface to bridge isolation barriers and bypass standard memory protection boundaries.",
  "technicalDetails": "The vulnerability resides in the GPU process handling logic within Google Chrome on Android, specifically affecting versions prior to 151.0.7922.109. The root cause stems from the utilization of uninitialized memory variables or buffers within GPU-related inter-process communication (IPC) routines or command processing pipelines.\nIn the Chromium multi-process architecture, the renderer process operates within a tightly restricted sandbox designed to limit system access. However, the renderer must communicate with the privileged browser and GPU processes to render web graphics via IPC mechanisms such as Mojo interfaces.\nAn attacker who has successfully compromised the renderer process—potentially via a prior remote code execution flaw or logical bug—can manipulate these communication channels. By supplying a crafted HTML page containing malicious JavaScript or WebGL/WebGPU commands, the attacker triggers specific code paths in the GPU process that read from memory locations containing previously allocated, uninitialized data.\nBecause the GPU process shares memory spaces or handles sensitive graphics state buffers, reading uninitialized memory allows the attacker to harvest remnants of sensitive data from process memory. This leaked information may include heap pointers, cryptographic keys, or fragments of other sensitive data processed concurrently within the GPU context.\nAuthentication and privilege requirements for this phase of the attack assume the adversary has already breached the initial renderer layer via a crafted HTML page. No direct network authentication is required beyond the user navigating to or loading the malicious web content, which subsequently triggers the internal renderer-to-GPU memory disclosure vector."
}