CVE-2025-54957
📋 TL;DR
This vulnerability in Dolby UDC allows remote attackers to cause a buffer overflow via a malformed DD+ bitstream, potentially leading to arbitrary code execution or system crashes. It affects systems running Dolby UDC versions 4.5 through 4.13 that process DD+ audio streams. The high CVSS score indicates critical severity requiring immediate attention.
💻 Affected Systems
- Dolby UDC (Universal Decoder Core)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM/root privileges leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Denial of service through decoder process crashes, potentially disrupting audio processing services and causing system instability.
If Mitigated
Limited to denial of service if memory protections like ASLR/DEP are effective, but still causes service disruption.
🎯 Exploit Status
Project Zero has published technical details and proof-of-concept. The vulnerability requires crafting a malformed DD+ bitstream but doesn't require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.14 or later
Vendor Advisory: https://professional.dolby.com/siteassets/pdfs/dolby-security-advisory-CVE-2025-54957-Oct-14-25.pdf
Restart Required: Yes
Instructions:
1. Download Dolby UDC version 4.14 or later from Dolby's official distribution channels. 2. Stop all services using Dolby UDC. 3. Install the updated version following vendor instructions. 4. Restart affected services and verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement upstream validation to reject malformed DD+ bitstreams before they reach the vulnerable decoder.
Process Isolation
allRun Dolby UDC decoder in a sandboxed or containerized environment with minimal privileges.
🧯 If You Can't Patch
- Implement network segmentation to isolate systems running vulnerable Dolby UDC from untrusted networks.
- Deploy application control to prevent execution of unauthorized code that could exploit this vulnerability.
🔍 How to Verify
Check if Vulnerable:
Check Dolby UDC version: If version is between 4.5 and 4.13 inclusive, the system is vulnerable.Check Version:
Check application documentation for version query method (varies by implementation).Verify Fix Applied:
Verify Dolby UDC version is 4.14 or higher and test with known malformed DD+ samples to ensure no crashes occur.📡 Detection & Monitoring
Log Indicators:
- DD+ decoder process crashes
- Memory access violation errors in application logs
- Unexpected process terminations
Network Indicators:
- Unusual network traffic to/from audio processing services
- Malformed audio stream patterns
SIEM Query:
Process:Name="ddplus_decoder" AND EventID=1000 OR EventID=1001 (Windows) OR Process crashes with segmentation fault (Linux)