Vulnerability Intelligence Report
Arbitrary write vulnerability in SbPei module leads to arbitrary code execution during PEI phase.
CVE-2022-40246
A potential attacker can write one byte by arbitrary address at the time of the PEI phase (only during S3 resume boot mode) and influence the subsequent boot stages. This can lead to the mitigations bypassing, physical memory contents disclosure, discovery of any secrets from any Virtual Machines (VMs) and bypassing memory isolation and confidential computing boundaries. Additionally, an attacker can build a payload which can be injected into the SMRAM memory. This issue affects: Module name: SbPei SHA256: d827182e5f9b7a9ff0b9d3e232f7cfac43b5237e2681e11f005be627a49283a9 Module GUID: c1fbd624-27ea-40d1-aa48-94c3dc5c7e0d
No Active Exploit Signals
CVSS Base Score
7.2
HIGH
Exploitability:0.6
Impact Score:6.1
EPSS Probability:0.46%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-123 ↗CWE-123 Write-what-where Condition
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| AMI | Aptio | 5.x (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.459%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | CERT/CC · CERT · USA |
| Reserved | 2022-09-08T00:00:00 |
| Published | 2022-09-20T17:35:33 |
| Patch Date | 2022-08-11 |
| Last Updated | 2025-05-28T18:41:09 |
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