External risk intelligence

WebGPU Out-of-Bounds Write in GPU Driver Leads to Memory Corruption

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-41157

This vulnerability resides within a GPU user-space driver process, which is a client-side component executed locally on a user's machine. While the trigger involves web content, the flaw is not in a public-facing service, appliance, or network gateway, but rather a client-side rendering issue.

Out-of-bounds Write

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A recently identified vulnerability impacts how certain web content is processed by the GPU, potentially leading to memory corruption and application crashes. This issue arises from an integer overflow when calculating memory size from untrusted web input, causing writes beyond intended boundaries. While the direct impact is instability within the affected process, it highlights the importance of secure handling of complex web content across various platforms.

Unsafe web content can crash browser or GPU processes.
Critical vulnerability in core rendering technology.
Confirm relevance and assess system exposure.

Attack Path

How an attacker could exploit the issue

An attacker can likely trigger this vulnerability by directing a victim to a specially crafted web page. The browser loads this malicious content, which then interacts with the GPU's rendering process. This interaction can lead to memory corruption within the GPU driver, potentially causing the browser or GPU process to crash.

Entry condition: Victim visits a malicious web page.
Trigger point: Unusual WebGPU content interaction.
Resulting risk: Browser or GPU process crash.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an out-of-bounds write in the GPU driver when processing unusual WebGPU content, potentially leading to memory corruption and instability in the browser or GPU process.

GPU driver memory at risk.
Malicious web content could trigger it.
Browser or GPU process may crash.

Operational Fix

Recommended remediation, mitigation, and detection steps

The vulnerability resides in the GPU user-space driver, triggered by specific web content. This points to an issue that would likely be managed by teams responsible for client-side endpoint security, browser management, or potentially platform/OS teams if the driver is deeply integrated. The first step is to confirm the presence of the affected technology, assess its exposure (e.g., if users are accessing untrusted web content), and then determine the accountable owner for remediation.

Identify owner and assess exposure.
Verify user access to untrusted content.
Plan remediation based on risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the GPU GLES render process involved in CVE-2026-41157?

The GPU GLES render process is a component of a device's graphics stack that handles rendering tasks, including those generated by WebGPU. It acts as an intermediary between web content and the physical graphics hardware, responsible for executing drawing commands and managing memory used for visual output.

How does an integer overflow cause the memory issue in CVE-2026-41157?

This vulnerability, classified as an out-of-bounds write (CWE-787), occurs when the driver calculates memory requirements based on untrusted web data. If the calculation overflows, the system allocates a buffer smaller than the data it intends to write. Consequently, the driver writes information past the end of the allocated space, which corrupts adjacent memory and compromises process stability.

What must occur for this vulnerability to be triggered?

An attacker must entice a user to visit a web page containing specifically crafted, unusual WebGPU content. The vulnerability is not triggered by simple, standards-compliant web navigation or standard graphic rendering; it requires the processing of complex or malicious instructions designed to exploit the faulty memory size calculation within the driver.

Is my network infrastructure at risk from CVE-2026-41157?

According to Halo Surface Signal, this is very unlikely. The flaw exists within a client-side GPU driver process on an individual user's machine, not within a public-facing service, network gateway, or server-side appliance. The risk is concentrated on end-user devices that process web-based graphics content.

How should I respond to this threat on my managed systems?

First, identify which devices in your environment utilize the affected GPU drivers. Review your endpoint management policies to ensure browsers and graphics drivers are updated to versions that include vendor-supplied security patches. Prioritize systems where users frequently interact with diverse or untrusted web content as part of their daily responsibilities.

References

www.imaginationtech.com/gpu-driver-vulnerabilities/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.