CVE-2025-31648
Reported by intel · Published February 10, 2026
Improper handling of values in the microcode flow for some Intel(R) Processor Family may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| microcode_ctl | Amazon Linux | 2:2.1-53.amzn2023.0.15 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Intel(R) Processor Family may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts. | See references |
| amazon:2023 | microcode_ctl | 0 |
| n/a | Intel(R) Processor Family may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are present with special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (low), integrity (low) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (low), integrity (low) and availability (none) impacts. | * |
| alpine | intel-ucode | 0 |
| amazon:2 | microcode_ctl | 0 |
Timeline
- Feb 10, 2026 CVE Published
- Feb 11, 2026 EPSS Score (30 in total, the first dated here)
- Feb 26, 2026 CVE Updated
- Jun 2, 2026 Security Advisory (3 in total, the first dated here)
- Jun 12, 2026 Coalition ESS Score
- Sep 26, 2026 Distribution Patch
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2025-31648
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