CVE-2026-106292 in Chrome
Summary
by MITRE • 10/06/2026
Buffer overflow in Fonts in Google Chrome prior to 155.0.8059.39 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: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-11675 represents a critical boundary condition within Google Chrome's font rendering subsystem, specifically affecting versions prior to 155.0.8059.39. This flaw is classified under the Common Weakness Enumeration standard as CWE-120, which denotes Buffer Copy without Checking Size of Input. The core technical issue stems from improper memory management within the fonts module, where input data derived from crafted HTML pages was not adequately validated against allocated buffer boundaries. When a user navigates to a maliciously constructed webpage containing specially formatted font resources or CSS directives, the browser's rendering engine attempts to process these inputs. Due to the lack of rigorous bounds checking during this processing phase, an attacker can supply oversized or malformed data structures that exceed the memory space reserved for handling font metrics and glyph information.
This buffer overflow condition allows for a write-what-where primitive, enabling the manipulation of adjacent memory regions. In modern browser architectures like Chromium, security relies heavily on process isolation to contain potential exploits within a sandboxed renderer process. However, this specific vulnerability bypasses those containment mechanisms by leveraging the overflow to corrupt critical data structures or function pointers used by the font handling subsystem. By carefully crafting the payload, an attacker can achieve arbitrary code execution outside the confines of the renderer sandbox. This effectively escalates privileges from a low-privilege context within the browser process to a higher-privilege state on the host operating system, allowing for full compromise of the user's environment.
The operational impact of this vulnerability is severe due to its remote exploitability and the ease with which it can be triggered through standard web browsing activities. An attacker does not need physical access or prior authentication; they merely need a victim to visit a malicious website hosted on their server. The attack vector aligns closely with ATT&CK technique T1059, Command and Scripting Interpreter, as well as T1203, Exploitation for Client Execution, because the initial foothold is gained through client-side code execution triggered by web content. Once arbitrary code is executed outside the sandbox, the attacker can install backdoors, exfiltrate sensitive data such as cookies and credentials stored in memory, or pivot to other systems on the local network. The medium severity rating assigned by Chromium reflects the complexity of exploitation relative to more critical flaws, but given the potential for complete system compromise, it remains a high-priority issue for enterprise security teams.
Mitigation strategies primarily involve immediate software updates to ensure all client machines are running version 155.0.8059.39 or later of Google Chrome, where the bounds checking logic in the fonts module has been corrected. For organizations unable to patch immediately due to compatibility concerns, network-level controls such as web proxy filtering can be employed to block access to known malicious domains hosting exploit kits. Additionally, enabling strict Content Security Policy headers on internal applications and utilizing browser hardening features like site isolation can reduce the attack surface by limiting cross-origin data access. Regular vulnerability scanning and monitoring for anomalous process behavior in endpoint detection systems are also recommended to detect potential exploitation attempts that may have bypassed initial defenses.