CVE-2026-95298 in Chrome
Summary
by MITRE • 09/29/2026
Use after free in Browser in Google Chrome prior to 154.0.8037.57 allowed a local attacker to potentially execute arbitrary code outside the sandbox via UI Interaction. (Chromium security severity: High)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/29/2026
The vulnerability identified as a use-after-free condition within the browser component of Google Chrome prior to version 154.0.8037.57 represents a critical memory management error that compromises the integrity of the application's execution environment. This specific flaw arises when the software continues to reference a memory block after it has been freed, leading to undefined behavior during runtime operations. In the context of modern web browsers, such vulnerabilities are particularly dangerous because they can be triggered through standard user interactions with maliciously crafted content or via UI elements that manipulate internal object lifecycles incorrectly. The severity is classified as high by Chromium security standards due to the potential for remote code execution and sandbox escape, although this specific instance notes a local attacker vector which may imply social engineering prerequisites or prior access conditions necessary to trigger the exploit chain effectively.
From a technical perspective, use-after-free vulnerabilities occur when an application allocates memory on the heap, frees it without nullifying the pointer, and subsequently accesses that same pointer while other processes might have reallocated the memory for different purposes. When Chrome encounters this state during UI interaction handling, the browser may interpret stale data as valid instructions or object references. This misinterpretation allows an attacker to control program flow by manipulating heap contents. If successful, this can lead to arbitrary code execution within the context of the compromised process. The mention of executing code outside the sandbox indicates that the vulnerability likely facilitates a breakout from Chrome's multi-process architecture and security boundaries, which are designed to isolate web content from the underlying operating system. Achieving such isolation bypass is a significant milestone for an attacker seeking full control over the victim's machine.
The operational impact of this vulnerability extends beyond simple application crashes or denial of service. While memory corruption can cause instability, the primary concern here is the potential for arbitrary code execution with elevated privileges relative to the sandboxed environment. An attacker who successfully exploits this flaw could install malware, steal sensitive data such as credentials and cookies, or use the compromised browser instance as a pivot point for further network attacks. The requirement of UI interaction suggests that exploitation may involve tricking the user into clicking on specific elements or navigating through crafted web pages that trigger the faulty memory handling routines during rendering or event processing phases. This aligns with common attack vectors where visual cues are used to mask malicious payloads, making detection by automated security tools more difficult without behavioral analysis.
Mitigation strategies for this vulnerability primarily involve immediate software updates. Users and administrators should upgrade Google Chrome to version 154.0.8037.57 or later, which contains patches addressing the memory management logic errors responsible for the use-after-free condition. In environments where patching is not immediately feasible, implementing strict content security policies can help reduce the attack surface by restricting the types of scripts and resources that are allowed to execute within browser contexts. Additionally, enabling sandbox enforcement mechanisms ensures that even if an exploit attempt occurs, its impact remains contained within a restricted environment rather than affecting the host operating system directly. Regular monitoring for unusual process behavior and keeping all associated plugins and extensions updated further reduces the likelihood of successful exploitation by minimizing potential entry points for attackers attempting to leverage this flaw.
This vulnerability is categorized under CWE-416, which defines use-after-free as an error where a pointer references memory that has already been freed, leading to unpredictable results or security breaches. In terms of offensive cybersecurity frameworks, such exploits often map to MITRE ATT&CK techniques related to initial access and privilege escalation, specifically those involving exploitation for client-side code execution. Understanding these classifications helps in developing more robust detection rules and incident response procedures tailored to memory corruption attacks within web browsers. Security teams should prioritize the deployment of this patch across all endpoints to eliminate the risk associated with this high-severity flaw in Chrome's browser engine.