Google Chrome CVE-2026-7955

Exploitation requires that the renderer process has been previously compromised by an independent exploit (this is not a direct renderer vulnerability). Once the renderer is compromised, the attacker must craft HTML containing GPU operations (WebGL calls, canvas rendering, or similar) that trigger the uninitialized variable read in the GPU subsystem. User interaction is required - the victim must visit or be redirected to the malicious HTML page. The vulnerability does not affect default configurations in any unique way; it affects all Chrome instances where the GPU component is active (standard configuration). The limiting factor is the two-stage attack requirement: direct network exploitation is not possible; an intermediate renderer compromise is mandatory.

CVSS 5.3 with AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N reflects moderate real-world risk constrained by high attack complexity (AC:H) and required user interaction (UI:R). The vulnerability is not a direct network-exploitable issue but a secondary information disclosure following renderer process compromise. Attack complexity is high because it requires both a prior renderer exploit and successful triggering of the uninitialized memory condition through crafted HTML. The confidentiality impact (C:H) is significant but limited to information already accessible within the renderer process memory space. No public exploit code or CISA KEV status is documented in the provided intelligence, suggesting this is a low-priority memory disclosure rather than a critical attack path. The Chromium severity rating of 'Medium' aligns with this assessment. Real-world exploitation requires a two-stage attack chain (renderer compromise first), limiting practical impact compared to direct renderer RCE vulnerabilities.

An attacker who has already compromised a Chrome renderer process (via a separate renderer exploit) crafts a malicious HTML page containing WebGL or GPU-related code designed to trigger uninitialized memory reads. When a user visits the attacker-controlled page, the GPU code executes within the compromised renderer, reading uninitialized GPU memory buffers that may contain sensitive data from the renderer's memory space. The attacker exfiltrates this information through JavaScript channels, gaining access to credentials, encryption keys, or other sensitive data resident in process memory.