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CVE-2025-4277
Tcg2Smm: improper input validation may lead to arbitrary code execution
High7.5EPSS 0.15%
- Published
- Updated
- Reserved
- Assigned by
- Insyde
Description
Tcg2Smm has a vulnerability which can be used to write arbitrary memory inside SMRAM and execute arbitrary code at SMM level.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| InsydeCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High7.5 | CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected Kernel 5.2 – < 05.2A.21
- affected Kernel 5.3 – < 05.39.21
- affected Kernel 5.4 – < 05.47.21
- affected Kernel 5.5 – < 05.55.21
- affected Kernel 5.6 – < 05.62.21
- affected Kernel 5.7 – < 05.71.21
What to do
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
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-4277)Record last updated .