CVE-2026-113093 in Chrome
Summary
by MITRE • 10/21/2026
Memory corruption in DisplayLocking in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as a memory corruption issue within the DisplayLocking component of Google Chrome prior to version 156.0.8078.47 represents a significant threat to browser integrity and user safety. This flaw resides in the rendering engine's handling of display lock mechanisms, which are designed to manage synchronization between layout updates and paint operations to ensure consistent visual output. When an attacker crafts a malicious HTML page that triggers specific edge cases within this locking logic, it can lead to improper memory management states. The core technical failure involves incorrect handling of object lifecycles or pointer references during the lock acquisition or release phases, resulting in conditions such as use-after-free or heap buffer overflow. These types of memory corruption errors are particularly dangerous because they allow for arbitrary read and write operations within the process memory space where Chrome operates.
From a security architecture perspective, this vulnerability is classified under CWE-120 Buffer Copy without Checking Size of Input Classic and potentially CWE-416 Use After Free depending on the specific manifestation in the DisplayLocking code path. The severity is rated as High by Chromium because it bypasses several layers of defense typically present in modern browsers. Although Chrome employs a multi-process architecture with sandboxing to limit the impact of exploits, memory corruption vulnerabilities often provide the necessary primitives for attackers to achieve arbitrary code execution within the renderer process. Once inside this restricted environment, an attacker can leverage additional techniques such as heap spraying or ROP chains to escape the sandbox and gain control over the underlying operating system. This transition from a web context to full system compromise is the primary concern associated with high-severity browser vulnerabilities of this nature.
The operational impact of exploiting this vulnerability allows a remote attacker to execute arbitrary code on the victim's machine through social engineering tactics, such as luring them to visit a specially crafted webpage or clicking a malicious link. The attack vector is classified under ATT&CK technique T1189 Drive-by Compromise, where no user interaction beyond visiting the site is required if other vulnerabilities are chained together, though typically some level of engagement like script execution is needed. If successful, the attacker could install malware, exfiltrate sensitive data stored in browser cookies or local storage, monitor browsing activity, or use the compromised machine as part of a botnet. The persistence and scope of damage depend heavily on whether the sandbox escape was fully realized, but even within the renderer process, significant privacy violations are possible.
Mitigation for this vulnerability primarily relies on timely software updates. Users must upgrade to Google Chrome version 156.0.8078.47 or later, where the DisplayLocking logic has been patched to correctly validate memory operations and prevent the corruption conditions from occurring. For organizations managing large fleets of devices, automated patch management systems should be configured to prioritize this update due to its high severity rating. Additionally, security teams can implement network-level controls such as web filtering proxies that block access to known malicious domains or suspicious content types that might host exploit kits targeting browser rendering engines. Endpoint detection and response solutions may also help identify anomalous behavior indicative of exploitation attempts, although prevention through patching remains the most effective defense against this specific class of memory corruption flaws in Chrome.