CVE-2026-79292 in Chrome
Summary
by MITRE • 08/26/2026
Integer overflow in Chromecast in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 08/26/2026
The vulnerability identified as an integer overflow within Google Chrome prior to version 152.0.7977.65 represents a critical failure in memory management logic, specifically affecting components utilized by Chromecast and the broader Chromium rendering engine. This flaw arises when arithmetic operations involving user-controlled or attacker-supplied data exceed the maximum value that can be stored within the designated integer variable type. In low-level programming contexts such as browser engines, integers are often used to calculate buffer sizes, array indices, or memory allocation requests. When an overflow occurs during these calculations, the resulting value wraps around to a small positive number rather than triggering an error condition. This miscalculation leads the application to allocate significantly less memory than required for subsequent operations, setting the stage for severe security consequences.
The operational impact of this vulnerability is profound because it facilitates privilege escalation from a sandboxed environment to arbitrary code execution outside that protective boundary. Modern browsers employ strict sandboxes to isolate web content and renderer processes, preventing malicious scripts from accessing sensitive system resources or user data directly. However, by exploiting the integer overflow, an attacker who has already compromised the renderer process through another vector can manipulate memory allocation routines. This allows for a heap-based buffer overflow where writes exceed the bounds of the allocated buffer due to the incorrect size calculation derived from the overflowed value. Such out-of-bounds writes enable the overwriting of adjacent memory structures, including function pointers or object headers, which can be leveraged to redirect program execution flow and execute arbitrary code with higher privileges than those granted by the sandbox policy.
From a classification perspective, this vulnerability aligns closely with Common Weakness Enumeration (CWE) identifiers such as CWE-190 for Integer Overflow or Wraparound and CWE-787 for Out-of-bounds Write. The exploitation path described corresponds to techniques found in the MITRE ATT&CK framework, particularly those involving memory corruption and sandbox escape mechanisms often categorized under lateral movement or privilege escalation tactics within a compromised host environment. The severity rating of High by the Chromium security team underscores the potential for remote code execution without user interaction beyond visiting a crafted webpage, provided that the renderer process is already targeted or influenced through social engineering or drive-by download techniques.
Mitigation strategies primarily involve updating to Google Chrome version 152.0.7977.65 or later, where the underlying arithmetic checks have been corrected to prevent wraparound conditions and ensure proper bounds checking before memory allocation. For organizations unable to immediately patch client endpoints, network-level controls such as web filtering proxies can be configured to block access to known malicious domains hosting exploit kits targeting this vulnerability. Additionally, enabling strict content security policies and disabling unnecessary plugins or features that expand the attack surface of the browser renderer can reduce the likelihood of initial compromise leading to exploitation of this specific memory corruption flaw. Continuous monitoring for anomalous process behavior in endpoint detection systems may also help identify attempts to leverage such vulnerabilities before full system compromise occurs.