Overview
CVE-2025-58476 is a medium-severity vulnerability affecting a bootloader in certain devices. This vulnerability allows a physical attacker to potentially read data from memory locations outside of the intended boundaries. Successfully exploiting this flaw could give attackers access to sensitive information stored in memory.
The vulnerability was discovered and addressed in the Security Maintenance Release (SMR) of December 2025, Release 1.
Technical Details
The vulnerability is an out-of-bounds read. This means the bootloader code attempts to access a memory location outside of the allocated buffer or data structure. This can happen due to various programming errors, such as incorrect indexing or insufficient bounds checking. A physical attacker with access to the device can leverage this vulnerability to potentially leak sensitive information stored in memory.
Precise technical details of the vulnerability (e.g., the specific code location and triggering conditions) are typically not publicly disclosed to prevent further exploitation attempts on unpatched devices.
CVSS Analysis
The Common Vulnerability Scoring System (CVSS) score for CVE-2025-58476 is 4.2 (MEDIUM).
- CVSS Score: 4.2
- Vector String: (The full CVSS vector string is not publicly available but would typically factor in attack vector, attack complexity, privileges required, user interaction, scope, confidentiality impact, integrity impact, and availability impact)
The Medium severity reflects the requirement of physical access and the potential for confidentiality impact (reading sensitive memory). While the attack requires physical proximity, the potential consequences of successful exploitation warrant immediate attention.
Possible Impact
The impact of CVE-2025-58476 can be significant for affected devices. A successful exploit could lead to:
- Information Disclosure: Attackers may be able to read sensitive data stored in memory, potentially including cryptographic keys, user credentials, or other confidential information.
- Further Exploitation: The leaked information could be used to facilitate further attacks, potentially leading to device compromise or data theft.
The physical access requirement limits the scope of the vulnerability, but the potential for sensitive data leakage is a serious concern.
Mitigation and Patch Steps
The primary mitigation for CVE-2025-58476 is to ensure that your device is updated to the latest security patch level. Specifically, devices should be updated to, or beyond, the SMR Dec-2025 Release 1.
- Check for Updates: Navigate to your device’s settings menu and check for software updates.
- Install Available Updates: If an update is available, download and install it promptly.
- Verify Patch Level: After the update, verify that the device is running the SMR Dec-2025 Release 1 (or later) to confirm that the vulnerability has been addressed.
