CVE-2025-4277

Tcg2Smm: improper input validation may lead to arbitrary code execution

State: Published
Severity: 7.5 High
Published: Aug 13, 2025
Updated: Aug 14, 2025
Reserved: May 5, 2025

Description

Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H	Insyde

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
InsydeH2OInsyde Software	Kernel 5.2 to before 05.2A.21Affected Kernel 5.3 to before 05.39.21Affected Kernel 5.4 to before 05.47.21Affected Kernel 5.5 to before 05.55.21Affected Kernel 5.6 to before 05.62.21Affected Kernel 5.7 to before 05.71.21Affected

References

https://www.insyde.com/security-pledge/sa-2025005/

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