{"uuid": "2f29301f-61ff-4fc4-a59a-a8125bf1af8d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-14303", "type": "seen", "source": "https://gist.github.com/hermanho/5e01f95cc83cbb3a00559d1b97240f52", "content": "# MSI PRO Z690-A DDR4 / BIOS 7D25v1N white BIOS screen fix\n\nAfter updating to the latest AMI BIOS **7D25v1N** (released for Secure Boot CA updates / security hardening), my PC could still boot into **Windows**, but I could **no longer enter BIOS**.\n\n## My hardware\n- **Motherboard:** MSI PRO Z690-A DDR4\n- **CPU:** Intel i7 KF\n- **GPU:** MSI GTX 970\n\n## Symptom\nAfter flashing BIOS **7D25v1N**:\n- Windows boots normally\n- Entering BIOS results in a **white screen**\n- Only **two numbers** are shown on screen\n\n## Likely cause\nThis BIOS changes some security-related defaults because of a vulnerability fix.\n\nRelease note excerpt:\n\n> Security enhancement: Enable Pre-boot DMA Protection, VT-d, and IOMMU Pre-boot defaults. (CVE-2025-14303)\n\nIn my case, the issue appears to be caused by **VT-d being enabled by default** after the update. This seems to affect BIOS display behavior with some older discrete GPUs.\n\n## Similar reports\n- [White BIOS screen after PRO H610M-E DDR4 firmware upgrade](https://forum-en.msi.com/index.php?threads/white-bios-screen-after-pro-h610m-e-ddr4-firmware-upgrade.416641/)\n- [Z690 Tomahawk WiFi DDR4 white screen in the BIOS on AMD RX550 and NV GT710](https://forum-en.msi.com/index.php?threads/z690-tomahawk-wifi-ddr4-white-screen-in-the-bios-on-amd-rx550-and-nv-gt710.414327/)\n- [BIOS corrupted / white screen after update B760 Gaming Plus WiFi E7D98IMS.HC0](https://forum-en.msi.com/index.php?threads/bios-corrupted-white-screen-after-update-b760-gaming-plus-wifi-e7d98ims-hc0.415562/)\n\n## Workaround\nThe workaround is to **disable Intel VT-D**, which restored normal BIOS access for me.\n\nIn my case, this was tricky because:\n- My CPU is an **i7 KF**, so there is **no iGPU**\n- I could not enter BIOS setup directly\n- But I was still able to change the setting from **Windows**\n\n## Fix from Windows using SCEWIN\nRun these steps in **Command Prompt as Administrator**.\n\n### 1. Open an elevated Command Prompt\nLaunch **cmd** with **Run as administrator**.\n\n### 2. Go to the SCEWIN directory\n```bat\ncd \"C:\\Program Files (x86)\\MSI\\MSI Center\\Lib\\SCEWIN\\5.05.01.0002\"\n```\n\n### 3. Check the current Intel VT-D setting\n```bat\nSCEWIN_64.exe /o /lang \"en-US\" /ms \"Intel VT-D Tech\" /hb\n```\n\nExample output:\n```text\nOptions =*[01]Enabled\n         [00]Disabled\n```\n\n### 4. Disable Intel VT-D\n```bat\nSCEWIN_64.exe /i /lang \"en-US\" /ms \"Intel VT-D Tech\" /qv 0x0 /hb\n```\n\nExample output:\n```text\nWarning: Power cycle reset required for some of the updated controls.\n\nQuestion value imported successfully.\n```\n\n### 5. Fully power cycle the machine\nShut down completely, then power it back on.\n\n## Result\nAfter disabling **Intel VT-D**, I was able to enter BIOS normally again.\n\n## Notes\n- This may help if you have:\n  - BIOS **7D25v1N** or another recent MSI BIOS with similar security hardening\n  - an older discrete GPU\n  - a system that still boots into Windows but shows a white screen in BIOS\n- Since my CPU is **i7 KF**, using a Windows-based configuration tool was necessary because I had no iGPU fallback.\n- This is a workaround based on my experience and similar reports, not an official MSI fix.\n\n## Keywords\nMSI, PRO Z690-A DDR4, 7D25v1N, white BIOS screen, BIOS cannot open, Intel VT-D, IOMMU, Pre-boot DMA Protection, CVE-2025-14303, GTX 970, KF CPU, SCEWIN", "creation_timestamp": "2026-05-18T01:54:48.000000Z"}