CVE-2026-107050 in RetroArch
Summary
by MITRE • 10/29/2026
An issue in libretro RetroArch v1.22.2 allows attackers to force another user into loading attacker-supplied code in their uid, leading to arbitrary code execution.
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Analysis
by VulDB Data Team • 10/29/2026
The vulnerability identified within the libretro RetroArch emulator core version 1.22.2 represents a critical security flaw centered on improper handling of external content inputs and system privileges. This issue fundamentally stems from a lack of sufficient validation or sanitization mechanisms when processing user-supplied data, specifically allowing an attacker to manipulate the execution context of the application. By exploiting this weakness, a malicious actor can coerce another user into loading code that has been crafted by the attacker directly within the security context of the victim's process. This mechanism effectively bypasses standard isolation boundaries because RetroArch operates with the permissions and identity of the logged-in user, meaning any code executed through this vector inherits those same privileges without additional elevation checks or sandboxing restrictions.
From a technical perspective, this flaw is characteristic of an injection vulnerability where untrusted data influences the execution flow of a program. The attacker leverages specific input vectors within RetroArch to inject malicious payloads that are then interpreted and run by the emulator core. Because emulators often require deep access to system resources to manage hardware emulation states, memory mapping, and peripheral interactions, successful exploitation grants the adversary significant control over the host environment. This is not merely a local information disclosure or denial of service but an arbitrary code execution scenario where the attacker dictates what instructions are processed by the CPU within the emulator's address space. The absence of strict input filtering allows for the construction of complex payloads that can bypass basic security controls, leading to full compromise of the user session.
The operational impact of this vulnerability is severe, as it facilitates remote or local code execution depending on how the malicious content is delivered. If RetroArch is used in a context where users load cores or game files from untrusted sources such as online repositories, forums, or peer-to-peer networks, an attacker can distribute a specially crafted file that triggers the exploit upon loading. Once executed, the arbitrary code runs with the user's privileges, potentially allowing for data theft, installation of persistent malware, pivoting to other systems on the network, or complete system takeover. This is particularly dangerous in multi-user environments or shared computing setups where one compromised account could lead to broader systemic insecurity due to the lack of privilege separation between different users and applications.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-94 Improper Control of Generation of Code, which covers injection flaws that allow attackers to inject code into a program for execution. It also maps closely to MITRE ATT&CK techniques related to Command and Scripting Interpreter abuse, specifically those involving the exploitation of application vulnerabilities to execute arbitrary commands. The attack vector often involves social engineering or malicious file distribution, falling under tactics like Initial Access if delivered remotely via phishing links or drive-by downloads, followed by Execution through legitimate system processes that have been hijacked.
Mitigation strategies for this vulnerability require a multi-layered approach focusing on input validation and privilege management. Developers must implement rigorous sanitization of all inputs passed to the emulator core, ensuring that only expected data types and structures are processed. Implementing strict allow-lists for file formats and content sources can prevent the loading of maliciously crafted files. Additionally, running RetroArch with reduced privileges or within a sandboxed environment limits the blast radius if an exploit is successful. Users should be advised to download cores and game ROMs only from trusted, verified sources and keep their software updated to ensure that any patches addressing this specific flaw are applied promptly. Security awareness training regarding the risks of executing unverified code in emulation environments is also critical for reducing exposure to such attacks.