CVE-2025-22831 – CVE-2025-22831 is an out-of-bounds write vulner... (How to Fix)

Q: What is the severity of CVE-2025-22831?

CVE-2025-22831 has a CVSS score of 7.8 (HIGH). CVE-2025-22831 is an out-of-bounds write vulnerability in AMI APTIOV BIOS firmware that allows local attackers to corrupt data and disrupt system availability. This affects systems using vulnerable AMI BIOS implementations. Attackers need local access to exploit this vulnerability.

📋 TL;DR

CVE-2025-22831 is an out-of-bounds write vulnerability in AMI APTIOV BIOS firmware that allows local attackers to corrupt data and disrupt system availability. This affects systems using vulnerable AMI BIOS implementations. Attackers need local access to exploit this vulnerability.

💻 Affected Systems

Products:

AMI APTIOV BIOS firmware

Versions: Specific versions not detailed in advisory; check vendor documentation

Operating Systems: All operating systems running on affected hardware

Default Config Vulnerable: ⚠️ Yes

Notes: Affects systems with AMI BIOS implementations. Exact hardware models depend on OEM implementations.

📦 What is this software?

Aptio V by Ami

View all CVEs affecting Aptio V →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system bricking requiring hardware replacement, permanent data loss, and denial of service across affected systems.

🟠

Likely Case

System crashes, boot failures, data corruption requiring reimaging, and temporary loss of availability.

🟢

If Mitigated

Limited impact with proper access controls, though successful exploitation could still cause system instability.

🌐 Internet-Facing: LOW - Requires local access to exploit, not directly exploitable over network.

🏢 Internal Only: HIGH - Local attackers or malware with physical/privileged access can exploit this to cause significant damage.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access and BIOS-level exploitation knowledge. No public exploits known at this time.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check with hardware/OEM vendor for specific BIOS updates

Vendor Advisory: https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025008.pdf

Restart Required: Yes

Instructions:

1. Identify your system manufacturer and model. 2. Visit manufacturer's support site. 3. Download latest BIOS/UEFI firmware update. 4. Follow manufacturer's flashing instructions carefully. 5. Reboot system after update.

🔧 Temporary Workarounds

Restrict physical access

all

Limit physical access to systems to prevent local exploitation

Implement secure boot

all

Enable secure boot to prevent unauthorized firmware modifications

Enable in BIOS/UEFI settings

🧯 If You Can't Patch

Isolate affected systems from untrusted users and networks
Implement strict physical security controls and monitoring

🔍 How to Verify

Check if Vulnerable:

Check BIOS version against vendor advisory or use: wmic bios get smbiosbiosversion (Windows) or dmidecode -t bios (Linux)

Check Version:

Windows: wmic bios get smbiosbiosversion | Linux: dmidecode -t bios | grep Version

Verify Fix Applied:

Verify BIOS version after update matches patched version from vendor

📡 Detection & Monitoring

Log Indicators:

System boot failures
BIOS/UEFI firmware modification events
Unexpected system crashes

Network Indicators:

Not network exploitable

SIEM Query:

EventID 12: System start OR EventID 6008: Unexpected shutdown (Windows) OR kernel panic logs (Linux)

📊 Metadata

CVE ID: CVE-2025-22831

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-787

EPSS Score: 0.07% exploit probability (22.1th percentile)

Published: October 14, 2025

Last Updated: October 22, 2025

🔗 References

https://go.ami.com/hubfs/Security%20Advisories/2025/AMI-SA-2025008.pdf Vendor Advisory

📤 Share & Export

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🔗 Related Vulnerabilities

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