CVE-2026-19148 in Chrome
Summary
by MITRE • 08/07/2026
Out of bounds write in GPU in Google Chrome on Linux prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/07/2026
This vulnerability represents a critical out-of-bounds write condition affecting the graphics processing unit component within Google Chrome on Linux systems prior to version 151.0.7922.109. The flaw exists in how the browser handles GPU operations and memory management, creating an opportunity for remote attackers who have already compromised the renderer process to potentially escape the sandbox protection mechanism. The vulnerability is classified as high severity by Chromium security standards due to its potential to undermine the core security model that separates the browser's rendering process from system-level operations.
The technical implementation of this vulnerability stems from improper bounds checking within GPU memory operations, specifically when processing crafted HTML content that triggers graphics-intensive rendering. When Chrome processes maliciously constructed web pages containing specific graphics commands or WebGL operations, the GPU driver fails to validate memory boundaries properly before writing data to allocated memory regions. This allows an attacker who has already gained control of the renderer process through a separate exploit to write data beyond the intended memory allocation, potentially overwriting critical system structures or executable code.
The operational impact of this vulnerability extends beyond simple privilege escalation as it directly compromises the browser's security sandbox architecture. The sandbox is designed to isolate renderer processes from the underlying operating system, preventing malicious code from accessing sensitive system resources or executing unauthorized operations. However, an out-of-bounds write in GPU memory can potentially corrupt memory structures that control process boundaries, allowing attackers to manipulate the memory layout in ways that bypass sandbox protections. This creates a pathway for attackers to execute arbitrary code with elevated privileges or access system resources that should be restricted.
This vulnerability aligns with multiple CWE classifications including CWE-787 Out-of-bounds Write and CWE-20 Improper Input Validation, reflecting both the memory corruption aspect and the input sanitization failure in the graphics processing pipeline. From an ATT&CK framework perspective, this issue maps to techniques involving privilege escalation through memory corruption and sandbox evasion, specifically relating to T1068 Exploitation for Privilege Escalation and T1548.003 Sudo and SUID. The attack surface is particularly concerning because it requires only a compromised renderer process as a foothold, meaning that successful exploitation of a separate vulnerability that allows code execution in the renderer can lead to full system compromise through this GPU-based attack vector.
Mitigation strategies should prioritize immediate patching of Chrome installations to version 151.0.7922.109 or later, which contains the necessary memory bounds checking fixes for GPU operations. Additionally, organizations should implement process monitoring and anomaly detection for unusual GPU memory allocation patterns, as well as maintain strict update schedules for browser software to minimize exposure windows. Network-level defenses such as content filtering and web application firewalls can help reduce the risk of encountering malicious HTML pages that might trigger this vulnerability during initial compromise phases.