# CVE-2025-54508: AMD SEV firmware improper RMP validation

Source: https://junglewise.ai/threats/cve-2025-54508-improper-validation-of-reverse-map-table-rmp-entries-in-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2025-54508 · Severity: info · Published 2026-11-10

AMD's Secure Encrypted Virtualization (SEV) firmware has a flaw in how it validates Reverse Map Table entries, which are used to protect virtual machine memory. A privileged attacker could exploit this to cause concurrent modifications to these protection entries without proper synchronization, potentially corrupting data integrity in virtualized environments.

Technologies: [Amd SEV firmware](https://junglewise.ai/threats/technologies/sev-firmware). Vendors: [Amd](https://junglewise.ai/threats/vendors/amd).

## Quick answers

**Is CVE-2025-54508 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-54508 being exploited in the wild.

**How severe is CVE-2025-54508?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** AMD SEV firmware.

**Is there a fix for CVE-2025-54508?** 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-2025-54508 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2025-54508?** Check whether you run Amd SEV 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

The vulnerability exists in the SEV firmware's Reverse Map Table (RMP) validation logic, where insufficient synchronization allows concurrent modifications to RMP entries from a privileged context. An attacker with elevated privileges can trigger race conditions in RMP entry updates, leading to loss of data integrity guarantees that SEV provides. This is a synchronization defect rather than a direct memory corruption vector.

## Affected products

- AMD SEV firmware

## Timeline

- 2026-11-10: disclosed

## References

- [https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3037.html](https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3037.html)

## Related threats

- [AMD SEV firmware pseudo-random number generator seed misuse](https://junglewise.ai/threats/cve-2025-29941-incorrect-usage-of-seeds-in-pseudo-random-number-generator-in-the)
- [AMD SEV firmware TOCTOU race condition in scatter list validation](https://junglewise.ai/threats/cve-2025-54506-a-time-of-check-to-time-of-use-toctou-race-condition-in-the-amd)
- [AMD SEV firmware improper handling of memory range overlaps](https://junglewise.ai/threats/cve-2025-54503-improper-handling-of-overlap-between-protected-memory-ranges-in)