CVE-2025-54511: AMD Secure Processor Privilege Escalation

CVE-2025-54511 Overview

CVE-2025-54511 is a privilege management flaw in the AMD Secure Processor (ASP). The vulnerability stems from improper handling of insufficient privileges, allowing an attacker to supply an input value to a function without holding the required privilege level. Successful exploitation results in unauthorized data writes, potentially impacting integrity and availability of the affected component. The flaw is categorized under [CWE-274] (Improper Handling of Insufficient Privileges). AMD published advisory AMD-SB-6027 detailing the issue. The vulnerability requires network access and low privileges, with no user interaction needed.

Critical Impact
An attacker with low privileges can write data to the AMD Secure Processor without sufficient authorization, resulting in loss of integrity and availability of the trusted execution environment.

Affected Products

AMD Secure Processor (ASP) — see AMD Security Bulletin AMD-SB-6027 for the full list of impacted platforms and firmware versions
Specific affected CPU and firmware versions: refer to the AMD advisory
CPE entries: Not Available in NVD at time of publication

Discovery Timeline

2026-05-15 - CVE-2025-54511 published to NVD
2026-05-15 - Last updated in NVD database

Technical Details for CVE-2025-54511

Vulnerability Analysis

The AMD Secure Processor is a dedicated ARM-based co-processor embedded in AMD SoCs. It manages cryptographic operations, secure boot, and trusted execution functions including Secure Encrypted Virtualization (SEV). The processor enforces a privilege model that segregates trusted firmware operations from lower-privileged contexts.

This vulnerability breaks that privilege model. A function within the ASP firmware accepts input values without verifying that the caller holds the required privilege level. An attacker leveraging a lower-privileged context can pass crafted inputs and trigger a write operation that should be reserved for higher-privileged code paths.

The resulting unauthorized write can corrupt ASP-managed state. This impacts the integrity and availability of trusted operations. Confidentiality is not affected based on the CVSS metrics published by AMD.

Root Cause

The root cause is a missing or incorrect privilege check inside an ASP firmware function. The function performs a write based on attacker-controlled input without validating that the caller is authorized to invoke the write path. This is a classic instance of [CWE-274], where insufficient privileges are not properly handled before sensitive operations execute.

Attack Vector

Exploitation requires the attacker to invoke the vulnerable ASP function with low existing privileges. No user interaction is required. The advisory does not document a public proof-of-concept exploit, and the EPSS data indicates a low probability of near-term exploitation. Refer to the AMD Security Bulletin AMD-SB-6027 for vendor-supplied technical context.

No verified public exploit code is available. Technical mechanics described in prose only — see vendor advisory for additional detail.

Detection Methods for CVE-2025-54511

Indicators of Compromise

No public indicators of compromise have been published for CVE-2025-54511 at this time.
Unexpected ASP firmware state changes, integrity check failures during secure boot, or anomalous SEV operations may indicate exploitation attempts.
Unexplained availability issues affecting cryptographic services backed by the ASP warrant investigation.

Detection Strategies

Monitor platform firmware logs for ASP error events, integrity verification failures, and unexpected reset conditions.
Track firmware version inventory across AMD-based fleet to identify systems running pre-patch ASP firmware.
Correlate kernel-level driver telemetry for processes invoking ASP communication interfaces with elevated frequency or anomalous parameters.

Monitoring Recommendations

Enable detailed platform attestation and log ASP measurement values for review against known-good baselines.
Forward firmware and platform integrity events to a centralized log analytics or SIEM pipeline for retention and correlation.
Audit administrative access to interfaces that communicate with the ASP, including hypervisor and SEV management paths.

How to Mitigate CVE-2025-54511

Immediate Actions Required

Review the AMD Security Bulletin AMD-SB-6027 to identify affected processors and firmware versions in your environment.
Apply AMD-supplied firmware and AGESA updates through your OEM or platform vendor as soon as they are validated for your hardware.
Restrict administrative and hypervisor-level access to systems running unpatched ASP firmware until updates are deployed.

Patch Information

AMD has published advisory AMD-SB-6027 with remediation guidance. Firmware fixes are distributed through OEM BIOS and AGESA updates. Consult your server, workstation, or platform vendor for the specific BIOS revision that incorporates the corrected ASP firmware. Validate updates in a test environment before production rollout, as ASP firmware updates require a system reboot and may interact with SEV-protected workloads.

Workarounds

No vendor-supplied workaround has been published. Firmware patching is the supported remediation path.
Reduce exposure by limiting access to local accounts and management interfaces that could invoke the vulnerable ASP function.
Where SEV is not in active use, restricting its enablement reduces the attack surface against ASP-managed operations.

bash

# Verify current AMD platform firmware version on Linux
sudo dmidecode -s bios-version
sudo dmidecode -s bios-release-date

# Inspect loaded AMD SEV / ASP kernel modules
lsmod | grep -Ei 'ccp|sev'
dmesg | grep -Ei 'ccp|sev|psp'