CVE-2025-47202 in Modem Exynos
Summary
by MITRE • 07/07/2025
In RRC in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 9110, W920, W930, W1000, Modem 5123, Modem 5300, and Modem 5400, the lack of a length check leads to out-of-bounds writes.
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Analysis
by VulDB Data Team • 10/27/2025
The vulnerability identified as CVE-2025-47202 represents a critical memory safety issue affecting Samsung's mobile processors and modem systems. This flaw exists within the Radio Resource Control (RRC) layer of various Samsung Exynos processor variants including the 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 9110, W920, W930, and W1000 models along with several modem versions such as 5123, 5300, and 5400. The vulnerability stems from insufficient input validation mechanisms that fail to properly verify data lengths before processing, creating a pathway for malicious actors to manipulate memory operations.
The technical implementation of this vulnerability manifests as a missing length check in the RRC processing logic, which directly enables out-of-bounds write operations. When the system receives malformed data packets or improperly sized messages, it fails to validate the incoming payload dimensions against expected parameters. This absence of bounds checking allows attackers to write data beyond the allocated memory buffers, potentially overwriting adjacent memory locations and corrupting critical system structures. The flaw operates at the kernel level within the processor's communication stack, making it particularly dangerous as it can affect the fundamental operation of wireless communication protocols.
From an operational perspective, this vulnerability presents significant risks to device security and stability across Samsung's extensive product portfolio. The affected processors are widely deployed in smartphones, wearable devices, and modem systems, meaning the exploit potential spans across multiple device categories and security domains. An attacker could leverage this vulnerability to execute arbitrary code, escalate privileges, or cause denial of service conditions that would compromise the entire device functionality. The out-of-bounds write capability also opens possibilities for information disclosure, where sensitive data stored in adjacent memory regions could be accessed or modified.
The security implications extend beyond immediate exploitation potential into broader system integrity concerns. This vulnerability aligns with CWE-129, which specifically addresses insufficient input validation leading to buffer overflows and memory corruption issues. The attack surface is particularly concerning given that these processors are integrated into devices that handle sensitive communications, personal data, and potentially enterprise networks. The flaw represents a classic example of how insufficient validation in communication protocols can create persistent security weaknesses that affect multiple generations of hardware.
Mitigation strategies for CVE-2025-47202 should focus on both immediate patching and architectural improvements. Samsung must provide firmware updates that implement proper length validation mechanisms and bounds checking in the RRC processing modules. Security researchers recommend implementing defensive programming practices including array bounds checking, memory protection mechanisms, and input sanitization routines. Organizations should also consider network-level monitoring to detect anomalous communication patterns that might indicate exploitation attempts. The remediation process must address all affected processor variants and modem configurations to ensure comprehensive protection across the entire product ecosystem.