Quick answers
- Is CVE-2025-62621 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-62621 being exploited in the wild.
- How severe is CVE-2025-62621?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- AMD Secure Encrypted Virtualization firmware.
- Is there a fix for CVE-2025-62621?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2025-62621 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2025-62621?
- Check whether you run Amd Secure Encrypted Virtualization firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is an expected behavior violation in AMD SEV firmware affecting the Reverse Map Table (RMP) enforcement mechanism. A malicious hypervisor can bypass RMP protections through an unspecified attack vector, potentially compromising SEV-SNP guest memory integrity. The issue requires hypervisor-level control and affects the firmware-level enforcement of memory access controls.
Affected products
- AMD Secure Encrypted Virtualization firmware
Timeline
- 2026-11-10: advisory