CVE-2026-40669
AMD Secure Encrypted Virtualization Off-by-One Memory Corruption Vulnerability
Description
An off-by-one error in AMD Secure Encrypted Virtualization (SEV) firmware could allow an attacker with hypervisor access to corrupt the Reverse Map Table (RMP) table, potentially resulting in loss of guest memory integrity.
INFO
Published Date :
Nov. 10, 2026, 10:10 p.m.
Last Modified :
Nov. 10, 2026, 10:10 p.m.
Remotely Exploit :
No
Source :
AMD
Affected Products
The following products are affected by CVE-2026-40669
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | b58fc414-a1e4-4f92-9d70-1add41838648 |
Solution
- Update AMD SEV firmware to the latest version.
- Apply vendor patches for affected systems.
- Verify RMP table integrity after updates.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40669 vulnerability anywhere in the article.