CVE-2025-4275
High
Description
A vulnerability in the digital signature verification process does not properly validate variable attributes which allows an attacker to bypass signature verification by creating a non-authenticated NVRAM variable. An attacker may to execute arbitrary signed UEFI code and bypass Secure Boot.
SeverityHigh
CVSS7.8
Exploit probability—
ProductInsydeH2O
PublishedJun 11, 2025
First seenJun 11, 2025
How to fix
Update
- Insyde Software InsydeH2O05.2A.16, 05.39.16, 05.47.16, 05.55.16, 05.62.16, 05.71.16 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Insyde Software InsydeH2O | Kernel 5.2 ≤ v < 05.2A.16, Kernel 5.3 ≤ v < 05.39.16, Kernel 5.4 ≤ v < 05.47.16, Kernel 5.5 ≤ v < 05.55.16, Kernel 5.6 ≤ v < 05.62.16, Kernel 5.7 ≤ v < 05.71.16 | 05.2A.16, 05.39.16, 05.47.16, 05.55.16, 05.62.16, 05.71.16 |
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