CVE-2025-4277

Tcg2Smm: improper input validation may lead to arbitrary code execution

Published Aug 13, 2025 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.

Remediation

Vendor Solution

Kernel 5.2, Version 05.2A.21 Kernel 5.3, Version 05.39.21 Kernel 5.4, Version 05.47.21 Kernel 5.5, Version 05.55.21 Kernel 5.6, Version 05.62.21 Kernel 5.7, Version 05.71.21

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2025-24532 Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.
History
Type Values Removed Values Added
First Time appeared Insyde
Insyde insydeh2o
Vendors & Products Insyde
Insyde insydeh2o
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.
Title Tcg2Smm: improper input validation may lead to arbitrary code execution
Weaknesses CWE-20
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Insyde
Published
Updated
Aug 14, 2025, 5:54 AM
Reserved
May 5, 2025, 2:10 AM
Status
Deferred
Published
Aug 13, 2025, 2:15 AM
Modified
Jun 17, 2026, 9:32 AM