CVE-2025-58348 in Mobile Processor
Summary
by MITRE • 02/03/2026
An issue was discovered in the Wi-Fi driver in Samsung Mobile Processor and Wearable Processor Exynos 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930 and W1000. There is unbounded memory allocation via a large buffer in a /proc/driver/unifi0/confg_tspec write operation, leading to kernel memory exhaustion.
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Analysis
by VulDB Data Team • 02/10/2026
This vulnerability exists within the Wi-Fi driver component of Samsung's Exynos mobile and wearable processors, specifically affecting models including the 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930, and W1000 chipsets. The flaw manifests as an unbounded memory allocation condition that occurs during a specific write operation to the /proc/driver/unifi0/confg_tspec file interface. This represents a critical security weakness that falls under CWE-131, which describes improper handling of buffer size parameters that can lead to memory allocation issues. The vulnerability allows an attacker to supply a large buffer size parameter through the configuration interface, potentially causing the kernel to allocate excessive memory resources without proper bounds checking.
The technical exploitation of this vulnerability occurs when a malicious actor writes to the designated proc filesystem entry with an oversized buffer specification. This write operation triggers kernel memory allocation routines that do not validate the size parameter against system memory constraints, resulting in uncontrolled memory consumption. The flaw essentially creates a memory exhaustion condition where the kernel's memory management system becomes overwhelmed by the excessive allocation requests, potentially leading to system instability or complete system crashes. This type of vulnerability is particularly dangerous in embedded systems and mobile devices where memory resources are constrained and system stability is paramount.
The operational impact of this vulnerability extends beyond simple system crashes to potentially enable more sophisticated attack vectors. When the kernel memory becomes exhausted, it can lead to denial of service conditions that may be exploited to disrupt device functionality or create opportunities for privilege escalation attacks. The vulnerability affects Samsung mobile and wearable devices that rely on these processors, potentially compromising millions of devices in the field. From an attack perspective, this weakness aligns with ATT&CK technique T1499.004, which covers network denial of service attacks, and represents a critical weakness in the kernel's memory management subsystem that could be leveraged by attackers to degrade system performance or availability. The unbounded allocation pattern also suggests potential for memory corruption issues that could lead to arbitrary code execution under certain conditions.
Mitigation strategies for this vulnerability should focus on implementing proper bounds checking within the kernel driver code to validate buffer size parameters before memory allocation occurs. Device manufacturers should prioritize firmware updates that address the specific memory allocation routine in the Wi-Fi driver component, ensuring that all buffer size inputs are validated against maximum permissible limits. System administrators should monitor for unauthorized access to the proc filesystem entries and implement additional access controls to limit which processes can write to these sensitive interfaces. The fix should incorporate input validation mechanisms that align with secure coding practices and prevent the exploitation of memory allocation vulnerabilities. Additionally, implementing memory monitoring and alerting systems can help detect unusual memory consumption patterns that may indicate exploitation attempts, providing early warning capabilities for potential attacks targeting this specific vulnerability.