CVE-2025-23107: Severe Out-of-bounds Write Vulnerability in Samsung Mobile Processor Exynos 1480 and 2400

Overview

CVE-2025-23107 is a critical vulnerability that was recently uncovered in Samsung’s Mobile Processor Exynos 1480 and 2400. This security flaw, due to a lack of a length check, can lead to out-of-bounds writes, potentially compromising the system and leading to data leakage. Given the ubiquity of Samsung’s mobile processors in various smartphone models, this vulnerability could have far-reaching implications for individual users and organizations alike.
The severity of this issue is emphasized by its high CVSS score of 8.6, indicating that its exploitation could cause significant impact on the integrity, availability, and confidentiality of the affected systems. Addressing this vulnerability swiftly is crucial to prevent potential system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-23107
Severity: High (CVSS: 8.6)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise and data leakage

Affected Products

Product | Affected Versions

Samsung Exynos 1480 | All versions
Samsung Exynos 2400 | All versions

How the Exploit Works

The exploit takes advantage of a lack of length check in the Samsung Exynos 1480 and 2400 processors leading to out-of-bounds writes. An attacker, with sufficient privileges, can write data beyond the allocated memory space, causing unexpected behavior in the system, including potential system crashes, data corruption, or even the execution of arbitrary code.

Conceptual Example Code

Below is a conceptual, simplified example of how the vulnerability might be exploited. This pseudo-code simulates the scenario where a malicious payload is written beyond the allocated memory, causing an out-of-bounds write:

#include <string.h>
void vulnerable_function(char *input) {
char buffer[256];
strcpy(buffer, input);  // No length check, potentially dangerous
}
int main() {
char malicious_payload[512];
memset(malicious_payload, 'A', 512);  // Fill the payload with 'A's
vulnerable_function(malicious_payload);  // This will cause an out-of-bounds write
return 0;
}

In real-world scenarios, the malicious payload would likely contain specially crafted data or instructions designed to manipulate the system in a way beneficial to the attacker.

Mitigation Guidance

Samsung has released patches to address this vulnerability. Users are advised to update their devices as soon as possible. As a temporary mitigation measure, users can also implement a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to help detect and block exploit attempts. However, this should not replace the need for applying the official patches.