CVE-2026-15766 in Chrome
Summary
by MITRE • 07/15/2026
Uninitialized Use in Skia in Google Chrome prior to 150.0.7871.125 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/15/2026
The vulnerability under discussion represents an uninitialized use flaw within the Skia graphics library component of Google Chrome, specifically affecting versions prior to 150.0.7871.125. This issue falls under the category of information disclosure vulnerabilities and has been classified with a high chromium security severity rating, indicating its potential for significant impact in malicious hands. The flaw exists within the Skia graphics library which is responsible for rendering graphics operations in Chrome's browser engine, making it a critical component that handles various graphical elements from web pages.
The technical nature of this vulnerability stems from the improper handling of memory allocation within the Skia library where variables or memory regions are accessed before being properly initialized. When processing crafted HTML content, the graphics rendering pipeline fails to initialize certain memory locations adequately, leading to potential leakage of sensitive data that may have been previously stored in those memory regions. This uninitialized memory access creates a situation where attackers can craft specific web pages that trigger this behavior and subsequently extract information that was previously present in the process memory. The vulnerability operates at the intersection of memory safety issues and graphics processing, where the interaction between HTML rendering and low-level graphics operations creates an exploitable condition.
The operational impact of this vulnerability extends beyond simple information disclosure as it provides attackers with a method to harvest potentially sensitive data from Chrome processes running on affected systems. This could include cached data, previous web content, authentication tokens, or other confidential information that may have resided in memory locations that were subsequently accessed without proper initialization. The remote exploitation capability means that an attacker needs only to convince a victim to visit a malicious website to potentially gain access to process memory contents, making this vulnerability particularly dangerous in real-world scenarios where users frequently browse the internet. Such information leakage could be leveraged for further attacks including credential theft, session hijacking, or other advanced persistent threat operations.
This vulnerability aligns with CWE-457: Use of Uninitialized Variable and represents a classic example of memory safety issues that have plagued software systems for decades. The ATT&CK framework categorizes this under T1059.001: Command and Scripting Interpreter - PowerShell, though more accurately it would fall under information gathering techniques where adversaries collect sensitive data from compromised systems. The remediation approach for this vulnerability involves updating to Chrome version 150.0.7871.125 or later where the Skia library has been patched to properly initialize all memory regions before use. Additionally, implementing proper memory management practices and conducting regular code reviews focusing on initialization patterns can help prevent similar issues in future development cycles. Organizations should also consider deploying network monitoring solutions to detect potential exploitation attempts and ensure timely patch deployment across all affected systems to minimize the risk window for exploitation.
The broader implications of this vulnerability highlight the importance of thorough security testing in graphics rendering components, particularly those that handle untrusted input from web pages. Modern browser architectures increasingly rely on complex graphics libraries that must be rigorously tested for memory safety issues given their exposure to potentially malicious content. This incident underscores the need for comprehensive static and dynamic analysis tools that can identify uninitialized variable usage patterns and other memory safety violations in large codebases like Skia, which serves as a foundation for numerous applications beyond just web browsers.