wikiSecurity Advisories for AMD-SB-3029
On November 11th, 2025, AMD published the Security Bulletin AMD-SB-3029 [1].An internally reported microcode bug in some EPYC™ AMD CPUs could allow a local attacker with administrator privileges to
execute SEV-SNP (Secure Encrypted Virtualization – Secure Nested Paging) guests using outdated TLB entries.
These mistakes may enable SNP-active vCPUs to reuse TLB-entries of other virtual machines (VMs), where the data integrity may be potentially endangered. AMD has published remedial measures for these security vulnerabilities.
Affected systems
Here is a tabular list of the affected systems:
| Program | Former Code Name | Mitigation
Option 1: µcode (Released as part of PI) |
Mitigation
Option 2: AGESA |
SEV Mitigation Vector Bit | CVE |
|---|---|---|---|---|---|
| AMD EPYC™ 7002 Series processors | "Rome" | Not Affected | CVE-2025-29934 | ||
| AMD EPYC™ 7003 Series processors | “Milan” | 0x0A0011DB | MilanPI_1.0.0.F
(2024-12-13) |
not affected | |
| AMD EPYC™ 7003 Series processors | "Milan-X" | 0x0A001244 | |||
| AMD EPYC™ 9004 Series processors | "Genoa"/ | 0x0A101154 | GenoaPI_1.0.0.G
(2025-06-26) | ||
| "Genoa-X" | 0x0A10124F | ||||
| "Bergamo" | 0x0AA00219 | ||||
| AMD EPYC™ 9005 Series processors | "Turin Classic" | 0x0B00211E | TurinPI_1.0.0.3
(2024-12-13) | ||
| “Turin Dense” | 0x0B101028 | ||||
In the following, you will find an excerpt from this table, in which all Supermicro mainboards are included that are offered by Thomas-Krenn: [2]
| AMD motherboard | BIOS version |
|---|---|
| H12SSW-iN/NT | 3.5 |
| H12SSL-i/C/CT/NT | 3.5 |
| H12DSi-N6/NT6 | 3.5 |
| H13SSW | 3.7 |
| H13SSL-N/NT | 3.7 |
Updates for products of Thomas-Krenn
Updates for the corresponding system can be found in the download area of Thomas-Krenn. The updates in the download area have been tested by us to guarantee the stability and compatibility of our systems.
If you require the latest version for your system and it is not yet available in our download area, you can get it at Asus, Supermicro or Gigabyte.
References
- ↑ Stale Translation Lookaside Buffer (TLB) Entry Vulnerability (www.amd.com/en/resources/product-security)
- ↑ AMD Security Bulletin AMD-SB-3020, October 2025 (www.supermicro.com)
More information
- AMD Security Bulletin AMD-SB-3029 (supermicro.com, November 2025)
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Translator: Alina Ranzinger Alina has been working at Thomas-Krenn.AG since 2024. After her training as multilingual business assistant, she got her job as assistant of the Product Management and is responsible for the translation of texts and for the organisation of the department.
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