CVE-2026-106215 in Chrome
Summary
by MITRE • 10/06/2026
Uninitialized resource in ANGLE in Google Chrome on on Windows prior to 155.0.8059.39 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as an uninitialized resource issue within the ANGLE graphics library component of Google Chrome on Windows represents a significant security risk that allows for out-of-bounds memory reads by remote attackers. This flaw, which was addressed in Chromium version 155.0.8059.39 and carries a High severity rating according to Chromium's internal classification system, stems from improper initialization practices within the codebase responsible for translating OpenGL ES calls into native graphics API commands such as DirectX or Vulkan. When ANGLE processes specific graphical operations triggered by maliciously crafted HTML content, it fails to properly initialize certain memory buffers or state variables before they are accessed. This oversight creates a scenario where the application attempts to read from memory locations that have not been allocated or initialized for this purpose, leading to an out-of-bounds read condition.
From a technical perspective, uninitialized resource vulnerabilities often arise when developers assume default values for pointers or data structures without explicitly setting them during object construction or state transitions. In the context of ANGLE, which serves as a critical bridge between web rendering engines and hardware acceleration features, such errors can have severe consequences. When an attacker crafts an HTML page that triggers specific WebGL operations or canvas manipulations, they can exploit this uninitialized state to cause Chrome to read arbitrary memory addresses. This capability effectively bypasses the sandboxing mechanisms designed to isolate browser processes from sensitive system resources. The ability to read outside the sandbox is particularly dangerous because it allows the extraction of data stored in other process spaces, potentially including cookies, session tokens, or even parts of the operating system's kernel memory if further exploitation chains are developed.
The operational impact of this vulnerability extends beyond simple information disclosure. By leveraging an out-of-bounds read through a crafted web page, a remote attacker can perform side-channel attacks to infer sensitive data based on timing differences or cache behavior associated with accessing specific memory regions. This type of attack is consistent with techniques documented under the Common Weakness Enumeration standard as CWE-457, which describes the use of an uninitialized variable that leads to unpredictable results depending on prior memory states. Furthermore, the exploitation path aligns with MITRE ATT&CK technique T1083, specifically file and directory discovery methods adapted for browser-based environments where attackers seek to enumerate accessible resources within a restricted environment. The high severity rating reflects the potential for this flaw to serve as an initial vector for more complex attacks that could lead to full system compromise if combined with other vulnerabilities or exploitation techniques targeting memory corruption primitives.
Mitigation strategies primarily involve ensuring timely application of vendor-supplied patches, specifically upgrading Google Chrome to version 155.0.8059.39 or later on Windows systems where ANGLE is utilized for hardware-accelerated rendering. For organizations managing large fleets of endpoints, automated patch management solutions should be configured to prioritize updates addressing high-severity browser vulnerabilities due to their widespread exploitability via standard web browsing activities. Additionally, security teams can implement strict content security policies and sandboxing configurations that limit the capabilities of embedded scripts and plugins within browsers. While these controls do not directly fix the underlying code defect in ANGLE, they reduce the attack surface by restricting what malicious HTML pages can achieve even if an out-of-bounds read occurs. Continuous monitoring for anomalous memory access patterns using endpoint detection and response tools may also help identify potential exploitation attempts before significant damage is incurred.