CVE-2025-4277
High
Description
Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.
SeverityHigh
CVSS7.5
Exploit probability—
ProductInsydeH2O
PublishedAug 13, 2025
First seenAug 13, 2025
Weakness typeCWE-20Improper input validation
How to fix
Update
- Insyde Software InsydeH2O05.2A.21, 05.39.21, 05.47.21, 05.55.21, 05.62.21, 05.71.21 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Insyde Software InsydeH2O | Kernel 5.2 ≤ v < 05.2A.21, Kernel 5.3 ≤ v < 05.39.21, Kernel 5.4 ≤ v < 05.47.21, Kernel 5.5 ≤ v < 05.55.21, Kernel 5.6 ≤ v < 05.62.21, Kernel 5.7 ≤ v < 05.71.21 | 05.2A.21, 05.39.21, 05.47.21, 05.55.21, 05.62.21, 05.71.21 |
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