CWE-1231
Improper Prevention of Lock Bit Modification
Description
The product uses a trusted lock bit for restricting access to registers, address regions, or other resources, but the product does not prevent the value of the lock bit from being modified after it has been set.
Hierarchy (View 1000)
Parents
Children
none
Related attack patterns (CAPEC)
CAPEC-680
CVEs mapped to this weakness (3)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2024-36354 | Hig | 0.49 | 7.5 | 0.00 | Sep 6, 2025 | Improper input validation for DIMM serial presence detect (SPD) metadata could allow an attacker with physical access, ring0 access on a system with a non-compliant DIMM, or control over the Root of Trust for BIOS update, to bypass SMM isolation potentially resulting in… | ||
| CVE-2025-52536 | Med | 0.44 | — | 0.00 | Feb 10, 2026 | Improper Prevention of Lock Bit Modification in SEV firmware could allow a privileged attacker to downgrade firmware potentially resulting in a loss of integrity. | ||
| CVE-2022-42285 | Med | 0.39 | 6.0 | 0.00 | Jan 13, 2023 | DGX A100 SBIOS contains a vulnerability in the Pre-EFI Initialization (PEI)phase, where a privileged user can disable SPI flash protection, which may lead to denial of service, escalation of privileges, or data tampering. |
- risk 0.49cvss 7.5epss 0.00
Improper input validation for DIMM serial presence detect (SPD) metadata could allow an attacker with physical access, ring0 access on a system with a non-compliant DIMM, or control over the Root of Trust for BIOS update, to bypass SMM isolation potentially resulting in…
- risk 0.44cvss —epss 0.00
Improper Prevention of Lock Bit Modification in SEV firmware could allow a privileged attacker to downgrade firmware potentially resulting in a loss of integrity.
- risk 0.39cvss 6.0epss 0.00
DGX A100 SBIOS contains a vulnerability in the Pre-EFI Initialization (PEI)phase, where a privileged user can disable SPI flash protection, which may lead to denial of service, escalation of privileges, or data tampering.