CVE-2025-58774 in AptioV
Summary
by MITRE • 10/13/2026
AMI APTIOV contains vulnerabilities in BIOS where users may cause “Buffer Access with Incorrect Length Value” by local access. Successful exploitation of this vulnerability could lead to buffer overflows, memory corruption, and arbitrary code execution, and also impact Confidentiality, Integrity, and Availability.
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Analysis
by VulDB Data Team • 10/13/2026
The Advanced Micro Devices AMI APTIOV BIOS firmware contains critical security flaws that stem from improper validation of input parameters during low-level system operations. Specifically, the vulnerability involves a buffer access mechanism where an incorrect length value is utilized when handling data structures within the Unified Extensible Firmware Interface environment. This defect allows local users to trigger conditions that result in writing beyond the allocated boundaries of memory buffers. The root cause lies in insufficient boundary checks performed by the firmware code before processing user-supplied or system-generated inputs, a classic design flaw often categorized under CWE-120 Buffer Copy without Checking Size of Input and CWE-787 Out-of-bounds Write. These weaknesses are particularly dangerous because they exist at the lowest level of the software stack, bypassing many operating-system-level protections that typically mitigate such issues in higher-layer applications.
Exploitation of this vulnerability requires local access to the system, meaning an attacker must already have some form of authenticated or physical presence on the target machine. However, once local access is achieved, the potential impact is severe and far-reaching. By manipulating the length value associated with buffer operations, a malicious actor can cause memory corruption that overwrites adjacent data structures in RAM. This overflow condition can be leveraged to hijack control flow within the BIOS execution environment or inject shellcode into system memory. Successful exploitation leads directly to arbitrary code execution with the highest level of privileges available at the firmware layer, effectively granting full control over the hardware and all software running on it.
The operational impact extends across all three pillars of information security: confidentiality, integrity, and availability. With arbitrary code execution in the BIOS context, an attacker can extract sensitive data stored in non-volatile memory or intercepted during boot processes, compromising confidentiality. The ability to modify firmware components undermines system integrity, allowing for persistent backdoors that survive operating system reinstalls and standard reboots. Furthermore, by corrupting critical system structures or triggering crashes through malformed inputs, the vulnerability poses a significant threat to availability, potentially rendering the hardware unusable until the BIOS is manually reflashed via external programming tools. This aligns with MITRE ATT&CK techniques related to persistence mechanisms such as Firmware Compromise and privilege escalation vectors like Exploitation for Privilege Escalation within pre-boot environments.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary defense is the deployment of vendor-provided BIOS updates that patch these specific buffer handling routines by implementing strict length validation before memory operations are executed. Organizations should ensure their firmware management processes include regular checks for AMI APTIOV patches, integrating them into standard maintenance windows where possible. Additionally, enabling Secure Boot can help mitigate some risks by ensuring only signed and trusted code is executed during the boot process, although this does not fully protect against vulnerabilities that allow modification of existing trusted components if the attacker has sufficient privileges to alter signatures or keys. Physical security controls are also essential since local access is a prerequisite for exploitation; restricting physical access to servers and workstations reduces the attack surface significantly. Finally, monitoring tools should be configured to detect anomalous behavior in pre-boot environments, such as unexpected changes to firmware settings or unusual memory allocation patterns during startup sequences, providing an additional layer of detection against active exploitation attempts.