CVE-2025-4277

Tcg2Smm: improper input validation may lead to arbitrary code execution

Description

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

Remediation

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Affected: Insyde Software InsydeH2O
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-4277?
CVE-2025-4277 has been scored as a high severity vulnerability.
How to fix CVE-2025-4277?
To fix CVE-2025-4277: 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
Is CVE-2025-4277 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-4277 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4277?
CVE-2025-4277 affects Insyde Software InsydeH2O.
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