CVE-2025-2296
📋 TL;DR
CVE-2025-2296 is an improper input validation vulnerability in EDK2 BIOS/UEFI firmware that allows local attackers to manipulate control flow. This could lead to arbitrary command execution, compromising system confidentiality, integrity, and availability. Systems using vulnerable EDK2 firmware implementations are affected.
💻 Affected Systems
- EDK2 (UEFI Development Kit)
⚠️ 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
Complete system compromise with persistent firmware-level malware, allowing attackers to bypass operating system security controls and maintain persistence across reboots.
Likely Case
Local privilege escalation allowing attackers to execute arbitrary code with elevated privileges, potentially leading to data theft or system manipulation.
If Mitigated
Limited impact with proper access controls and monitoring, potentially reduced to denial of service or system instability.
🎯 Exploit Status
Requires local access to the system. Exploitation details not publicly available in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check GHSA-6pp6-cm5h-86g5 for specific patched versions
Vendor Advisory: https://github.com/tianocore/edk2/security/advisories/GHSA-6pp6-cm5h-86g5
Restart Required: Yes
Instructions:
1. Check system firmware/BIOS version. 2. Contact hardware vendor for firmware updates. 3. Apply firmware update following vendor instructions. 4. Reboot system to activate new firmware.
🔧 Temporary Workarounds
Restrict Physical Access
allLimit physical and console access to vulnerable systems to authorized personnel only.
Enable Secure Boot
allEnable UEFI Secure Boot to prevent unauthorized firmware/OS modifications.
🧯 If You Can't Patch
- Implement strict physical security controls and access monitoring
- Isolate vulnerable systems in secure network segments with limited access
🔍 How to Verify
Check if Vulnerable:
Check system firmware version and compare with vendor patched versions. Use 'dmidecode -t bios' on Linux or 'wmic bios get smbiosbiosversion' on Windows.Check Version:
Linux: dmidecode -t bios | grep Version; Windows: wmic bios get smbiosbiosversionVerify Fix Applied:
Verify firmware version after update matches patched version from vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected firmware/BIOS access attempts
- System reboots with firmware update activity
- Security software alerts for firmware tampering
Network Indicators:
- Unusual outbound connections from firmware management interfaces
SIEM Query:
source="bios_logs" AND (event_type="firmware_access" OR event_type="uefi_event")