CVE-2025-48505: Vitis Unified Privilege Escalation Flaw

CVE-2025-48505 Overview

CVE-2025-48505 is a local privilege escalation vulnerability in the AMD Vitis™ Unified software installation path on Windows systems. Weak file system permissions on the installation directory allow a low-privileged local user to modify files or replace binaries. When a higher-privileged user or service subsequently executes those files, the attacker gains elevated code execution rights.

The issue is tracked under CWE-276: Incorrect Default Permissions and disclosed in AMD Security Bulletin #8015.

Critical Impact
A local low-privileged user can escalate to higher privileges and execute arbitrary code on affected Windows hosts running Vitis™ Unified.

Affected Products

AMD Vitis™ Unified software on Windows (per AMD Security Bulletin #8015)

Discovery Timeline

2026-08-11 - CVE-2025-48505 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2025-48505

Vulnerability Analysis

The vulnerability originates from insecure permissions applied to the Vitis™ Unified installation directory during setup on Windows. Standard, non-administrative users receive write access to files or subdirectories within the installation path. This breaks the trust boundary between low-privileged accounts and privileged processes that later read from or execute those files.

An attacker with local, low-privileged access can replace legitimate binaries, dynamic-link libraries, or scripts with malicious equivalents. When an administrator, service account, or scheduled task subsequently invokes the affected files, the attacker's payload executes in the elevated security context. This yields arbitrary code execution and full privilege escalation on the host.

The advisory classifies the attack as local, requiring both local access and some level of user interaction to trigger the elevated execution path. The scope is limited to the machine where Vitis™ Unified is installed.

Root Cause

The root cause is CWE-276: Incorrect Default Permissions. The installer creates the Vitis™ Unified directory tree with access control lists (ACLs) that grant write or modify rights to non-administrative users. Directories containing executable content should restrict write access to SYSTEM and Administrators only.

Attack Vector

Exploitation requires the following conditions:

Local interactive or remote session access with a standard user account
A writable file or directory under the Vitis™ Unified installation path
A privileged user, service, or scheduled task that later executes content from that path

The attacker plants a malicious payload (for example, a replaced executable or a DLL placed for DLL search-order hijacking) inside the installation directory. When the higher-privileged process runs, Windows loads the attacker-controlled code with elevated privileges. Refer to AMD Security Bulletin #8015 for vendor-specific technical detail.

Detection Methods for CVE-2025-48505

Indicators of Compromise

Unexpected creation or modification of .exe, .dll, .bat, or .ps1 files under the Vitis™ Unified installation path by non-administrative accounts
Processes launched from the installation directory running under SYSTEM or administrative tokens after being written by a standard user
New or modified files in the installation tree whose file owner is a low-privileged local account

Detection Strategies

Audit ACLs on the Vitis™ Unified installation directory using icacls and flag any entries granting Modify or Write to Users, Authenticated Users, or Everyone
Enable Windows object access auditing (Event ID 4663) on the installation path to record write attempts by non-privileged users
Correlate file-write events in the installation directory with subsequent process-creation events (Event ID 4688) executing from the same path under elevated tokens

Monitoring Recommendations

Continuously monitor process execution from the Vitis™ Unified installation directory and alert on parent-child anomalies
Track integrity of binaries in the installation path using file hashing and compare against known-good vendor hashes
Forward file system and process telemetry from developer workstations to a centralized SIEM for cross-host analysis

How to Mitigate CVE-2025-48505

Immediate Actions Required

Apply the fix identified in AMD Security Bulletin #8015 as soon as it is available for your Vitis™ Unified version
Restrict ACLs on the existing installation directory to remove write and modify permissions from non-administrative principals
Inventory all workstations that host Vitis™ Unified and prioritize remediation on shared or multi-user systems

Patch Information

AMD has published remediation guidance in AMD Security Bulletin #8015. Follow the vendor advisory for the specific fixed versions and update procedures for Vitis™ Unified on Windows.

Workarounds

Manually reset permissions on the Vitis™ Unified installation directory so only SYSTEM and Administrators retain write access
Relocate the installation to a protected path such as C:\Program Files\ where default ACLs restrict standard user writes
Limit interactive logon on hosts running Vitis™ Unified to trusted developer accounts and remove unnecessary local users

bash

# Example: reset permissions on the Vitis Unified install directory (run as Administrator)
takeown /F "C:\Xilinx\Vitis" /R /D Y
icacls "C:\Xilinx\Vitis" /reset /T /C
icacls "C:\Xilinx\Vitis" /inheritance:r
icacls "C:\Xilinx\Vitis" /grant:r "SYSTEM:(OI)(CI)F" "Administrators:(OI)(CI)F" "Users:(OI)(CI)RX"