CVE-2026-106423 in Chrome
Summary
by MITRE • 10/07/2026
Use after free in Media in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6774 represents a critical memory corruption flaw within the media handling subsystem of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This issue is classified as an out-of-bounds write or use-after-free condition that occurs when processing crafted multimedia content. The root cause lies in improper management of object lifecycles within the browser's media pipeline, where a pointer to a memory region remains valid and accessible even after that memory has been deallocated by the system. This discrepancy allows for subsequent operations to interact with freed memory blocks, leading to unpredictable behavior and potential exploitation scenarios that compromise the integrity of the application state.
From a technical perspective, this flaw falls under the Common Weakness Enumeration category CWE-416, which defines use-after-free errors as a class of vulnerabilities where software continues to use a pointer after it has been freed. In the context of Chrome's architecture, such an error can be triggered by rendering specific HTML pages that contain maliciously crafted media elements or scripts designed to manipulate the timing and lifecycle of internal objects. When the browser attempts to access these deallocated resources during playback or processing operations, it may overwrite adjacent memory structures or execute arbitrary instructions if the attacker has successfully controlled the content written into the reused memory space. This mechanism bypasses standard safety checks because the application believes it is interacting with a valid object rather than corrupted data.
The operational impact of this vulnerability is severe due to its potential for remote code execution within the browser's sandboxed environment. Although Chrome employs multiple layers of security isolation, including site isolation and process separation, successful exploitation of this use-after-free condition can allow an attacker to escape these constraints under certain conditions or cause a denial of service through crashes. An adversary could craft a malicious webpage that, when visited by a user, triggers the vulnerability during media processing. This enables the execution of arbitrary code with the privileges of the browser process, potentially leading to data theft, installation of malware, or further lateral movement within a compromised network if additional vulnerabilities are chained together.
Industry frameworks such as MITRE ATT&CK classify this type of exploitation under techniques related to memory corruption and privilege escalation, specifically mapping to T1203 Exploitation for Client Execution when the attack targets client-side applications like web browsers. The high severity rating assigned by Chromium security reflects the ease with which remote attackers can leverage this flaw without requiring user interaction beyond visiting a malicious site or having media content auto-played in an embedded context. Mitigation strategies primarily involve updating to Google Chrome version 155.0.8059.39 or later, where the underlying memory management logic has been corrected to ensure proper pointer invalidation and lifecycle tracking. Additionally, users should enable automatic updates for their browsers to receive security patches promptly and consider employing browser hardening techniques such as disabling unnecessary plugins or using sandboxed browsing profiles to limit the blast radius of potential exploits.