CVE-2026-58008 in Trusted Firmware
Summary
by MITRE • 09/24/2026
Stack-based buffer overflow vulnerability in Altera Trusted Firmware on HPS allows Exploitation of Improperly Configured or Implemented Memory Protections.
This issue affects Trusted Firmware: through socfpga_v2.14.0.
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Analysis
by VulDB Data Team • 09/24/2026
The identified vulnerability represents a critical security flaw within the Altera Trusted Firmware, specifically impacting systems utilizing Hard Processor Systems (HPS) and affecting versions up to socfpga_v2.14.0. This software component serves as the initial execution environment for ARM-based processors in Intel FPGA devices, responsible for early hardware initialization, secure boot verification, and handing off control to higher-level operating system firmware or kernels. The core of this vulnerability is a stack-based buffer overflow, which occurs when data written to a fixed-size memory location on the call stack exceeds its allocated boundaries. This condition typically arises from insufficient bounds checking during input processing functions within the Trusted Firmware codebase, allowing an attacker to overwrite adjacent memory locations that contain critical control flow data such as return addresses or function pointers.
The exploitation of this vulnerability directly targets improperly configured or implemented memory protections designed to prevent arbitrary code execution. Modern embedded systems rely on hardware-enforced security features like Stack Canaries, Address Space Layout Randomization (ASLR), and Data Execution Prevention (DEP) to mitigate the impact of buffer overflows. However, in many IoT and industrial control system deployments using Altera FPGAs, these protections may be disabled for performance reasons or due to misconfiguration during the firmware build process. When such protections are absent or ineffective, an attacker can leverage the stack-based overflow to gain precise control over the instruction pointer. By carefully crafting input data that overwrites the return address with a payload pointing to shellcode injected into the same memory space, the adversary achieves arbitrary code execution within the privileged context of the Trusted Firmware.
From an operational perspective, compromising the Trusted Firmware has severe implications for system integrity and availability. Since this firmware runs at the highest privilege level before any operating system is loaded, successful exploitation grants attackers full control over the underlying hardware platform. This can lead to complete bypass of secure boot mechanisms, allowing unsigned or malicious code to execute with unrestricted access to memory peripherals and network interfaces. The attacker could establish a persistent backdoor that survives reboots if they modify non-volatile storage variables managed by the firmware. Furthermore, because Trusted Firmware often handles cryptographic operations for key exchange and authentication during the boot process, compromising it may allow an adversary to intercept or decrypt sensitive communications between system components, effectively neutralizing the security architecture of the entire device.
This vulnerability aligns with Common Weakness Enumeration (CWE) category CWE-121, which describes a stack-based buffer overflow where data is written beyond the bounds of a fixed-size stack buffer. It also relates to CWE-94, specifically in cases where improper control of code execution leads to remote code execution or privilege escalation. In terms of adversary tactics and techniques, this exploit maps directly to MITRE ATT&CK technique T1055, which covers Process Injection, as well as T1218, Signed Binary Proxy Execution if the attacker utilizes legitimate system binaries for further exploitation after gaining initial foothold via the firmware vulnerability. The lack of adequate input validation in low-level system software is a classic example of CWE-20 Improper Input Validation leading to memory corruption errors.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is to apply vendor-provided patches that update the Trusted Firmware to versions later than socfpga_v2.14.0, where developers have presumably implemented stricter bounds checking for all stack-allocated buffers involved in input handling. For systems unable to immediately patch due to legacy constraints or certification requirements, administrators should ensure that hardware memory protection features are explicitly enabled and correctly configured during the firmware build process. This includes enabling Stack Smashing Protection (SSP) via compiler flags such as -fstack-protector-strong, ensuring ASLR is active for any dynamically loaded modules, and verifying that DEP/NX bits are set in page tables to prevent execution of data on the stack. Additionally, implementing strict input validation at all entry points into Trusted Firmware functions can reduce the attack surface by rejecting malformed or excessively long inputs before they reach vulnerable memory allocation routines. Regular security audits focusing on low-level C code patterns common in embedded systems will help identify similar vulnerabilities across other components of the firmware suite.