CVE-2026-7955: Google Chrome Information Disclosure Flaw

CVE-2026-7955 Overview

CVE-2026-7955 is an uninitialized memory use vulnerability [CWE-457] in the GPU component of Google Chrome before version 148.0.7778.96. A remote attacker who has already compromised the renderer process can read potentially sensitive data from process memory by serving a crafted HTML page. Google classifies the Chromium security severity as Medium.

The flaw affects Chrome on Windows, macOS, and Linux. Successful exploitation requires user interaction and a prior renderer compromise, which raises attack complexity. Even so, the issue can leak memory contents that aid sandbox escape or further exploitation chains.

Critical Impact

Attackers chaining this bug with a renderer compromise can extract memory contents from the GPU process, exposing sensitive data and weakening Chrome's sandbox boundary.

Affected Products

• Google Chrome prior to 148.0.7778.96
• Microsoft Windows builds running vulnerable Chrome versions
• Apple macOS and Linux builds running vulnerable Chrome versions

Discovery Timeline

• 2026-05-06 - CVE-2026-7955 published to NVD
• 2026-05-07 - Last updated in NVD database

Technical Details for CVE-2026-7955

Vulnerability Analysis

The vulnerability resides in Chrome's GPU process, which handles graphics command buffers, shader compilation, and compositor operations on behalf of renderers. The GPU process reads a memory region before the code path that should populate it has executed. The resulting read returns whatever residual bytes occupied that allocation, which can include pointers, tokens, or fragments of prior IPC payloads.

Because the GPU process holds elevated privileges relative to the renderer sandbox, leaked bytes give attackers reconnaissance value. An attacker can use disclosed addresses to defeat Address Space Layout Randomization (ASLR) or to locate gadgets for a follow-on exploit. The vulnerability does not, on its own, grant code execution.

Exploitation requires the attacker to already control the renderer through a separate bug. The crafted HTML page then issues GPU commands that reach the uninitialized state. User interaction such as page navigation or rendering is required for the path to trigger.

Root Cause

The defect maps to [CWE-457: Use of Uninitialized Variable]. A code path in the GPU component reads a stack or heap allocation without first writing a defined value. Compiler optimizations and allocation reuse increase the likelihood that the read returns attacker-relevant data rather than zeros.

Attack Vector

The attack vector is network-based through a malicious or compromised website. Delivery mechanics rely on:

• A pre-existing renderer compromise that lets the attacker issue arbitrary GPU IPC messages.
• A crafted HTML page that drives the renderer into the vulnerable GPU code path.
• User interaction to load the page and trigger rendering.

The vulnerability mechanism is described in Google's Chrome Stable Channel Update and the Chromium Issue Tracker Entry. No public proof-of-concept code is available.

Detection Methods for CVE-2026-7955

Indicators of Compromise

• Chrome processes running versions below 148.0.7778.96 after the patch release window.
• GPU process crashes or anomalous restarts coinciding with rendering of untrusted pages.
• Renderer process anomalies preceding GPU IPC traffic spikes, suggesting a chained exploit attempt.

Detection Strategies

• Inventory installed Chrome versions across endpoints and flag any build below 148.0.7778.96.
• Correlate browser child-process telemetry to detect renderer compromise patterns that typically precede GPU-targeted exploitation.
• Monitor for unexpected outbound connections initiated by the Chrome GPU process, which should not normally make network calls.

Monitoring Recommendations

• Collect Chrome crash dumps and feed them into a SIEM or data lake for trend analysis on GPU process faults.
• Track web filtering logs for traffic to newly registered or low-reputation domains delivering complex HTML or WebGL content.
• Alert on Chrome processes spawning shell binaries or accessing credential stores, which would indicate a successful chained exploit.

How to Mitigate CVE-2026-7955

Immediate Actions Required

• Update Chrome to 148.0.7778.96 or later on all Windows, macOS, and Linux endpoints.
• Force a browser restart through endpoint management tooling to ensure the patched binary is loaded.
• Audit managed extensions and remove any that are not strictly required, reducing renderer attack surface.

Patch Information

Google released the fix in the Chrome Stable channel as version 148.0.7778.96. Details are published in the Google Chrome Stable Update advisory. Enterprise administrators should validate auto-update enrollment and confirm policy settings do not pin clients to older builds.

Workarounds

• Disable hardware acceleration in Chrome via chrome://settings or the HardwareAccelerationModeEnabled enterprise policy to reduce exposure of the GPU process until patching completes.
• Restrict browsing to trusted sites through web filtering or enterprise browser policies for high-risk user groups.
• Apply the principle of least privilege on user accounts so that any post-exploitation activity has limited reach.

# Verify Chrome version on Linux endpoints
google-chrome --version

# Windows: query installed Chrome version from the registry
reg query "HKLM\SOFTWARE\Google\Update\Clients\{8A69D345-D564-463C-AFF1-A69D9E530F96}" /v pv

# Enterprise policy snippet to disable hardware acceleration as a temporary workaround
# Linux: /etc/opt/chrome/policies/managed/disable-hwaccel.json
{
  "HardwareAccelerationModeEnabled": false
}