CVE-2026-17680 in Chrome
Summary
by MITRE • 07/30/2026
Heap buffer overflow in Color in Google Chrome on ChromeOS prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical heap buffer overflow flaw within the color handling components of Google Chrome running on ChromeOS systems. The issue stems from improper memory management when processing color-related data structures, specifically affecting the rendering pipeline where color information is processed and manipulated. The vulnerability exists in the chromium codebase at the intersection of graphics processing and memory allocation functions, creating a scenario where an attacker can manipulate heap memory through malformed color data.
The technical exploitation pathway begins with compromising the renderer process, which is typically achieved through a separate initial attack vector such as a sandbox escape or privilege escalation. Once inside the renderer process, the attacker can craft malicious HTML content that triggers the vulnerable color processing code path. The heap buffer overflow occurs when the application attempts to write more data into a heap-allocated memory region than it was originally sized for, potentially overwriting adjacent memory locations including metadata used by the heap allocator itself.
The operational impact of this vulnerability is severe as it enables a remote attacker to perform sandbox escape attacks, effectively breaking out of the isolated renderer process boundaries that Chrome employs to contain potential exploits. This allows the attacker to execute arbitrary code with the privileges of the compromised browser process, potentially leading to full system compromise. The vulnerability affects ChromeOS versions prior to 151.0.7922.72, indicating this was a time-sensitive issue where organizations needed to update their systems promptly to maintain security posture.
From a cybersecurity perspective, this vulnerability aligns with CWE-121 heap-based buffer overflow and represents a classic sandbox escape vector that attackers can leverage in advanced persistent threat campaigns. The ATT&CK framework categorizes this under privilege escalation and persistence techniques, specifically targeting the T1059 command and scripting interpreter and T1078 valid accounts categories. Organizations should implement immediate patch management protocols and consider network segmentation to limit potential exploitation scope, while monitoring for suspicious browser activity that might indicate attempted exploitation of similar memory corruption vulnerabilities.
The fix implemented by Google involved strengthening input validation mechanisms within the color processing components and adding additional bounds checking to prevent heap memory overwrites. This remediation addresses the root cause by ensuring all color data is properly validated before being processed by memory allocation functions, thereby preventing the overflow condition that enabled sandbox escape capabilities. Security teams should also consider implementing automated vulnerability scanning tools that can detect outdated ChromeOS versions and enforce mandatory update policies to protect against known vulnerabilities in the browser rendering engine.