Main Vulnerability Database Vulnerabilities #VU110699

Exposed dangerous method or function in InsydeH2O Kernel - CVE-2025-4275

Published: June 10, 2025 / Updated: August 6, 2026

Vulnerability identifier: #VU110699

CSH Severity: Low

CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-4275

CWE-ID: CWE-749

Exploitation vector: Local access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows an attacker to escalate privileges on the system.

The vulnerability exists due to usage of an unprotected NVRAM variable. An attacker with physical access to the system can inject their own certificate in this variable and subsequently run arbitrary firmware (signed by the injected certificate) during the early boot process within the UEFI environment.

Affected software

InsydeH2O Kernel
Dell G15 5535
Alienware m15 R7 AMD
Alienware m17 R5 AMD
Dell G15 5525

How to mitigate CVE-2025-4275

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Dell G15 5535 - update to 1.14.0
Alienware m15 R7 AMD - update to 1.23.0
Alienware m17 R5 AMD - update to 1.23.0
Dell G15 5525 - update to 1.23.0

Links to Public Exploits and PoC-codes

Exploit #12870 - Vulnerable-UEFI-Application-for-CVE-Exploitation (A deliberately vulnerable UEFI application designed for practicing firmware exploitation and experimenting with different UEFI exploitation techniques.) (August 6, 2026)

External References

https://www.kb.cert.org/vuls/id/211341