# CVE-2025-62620: AMD EPYC improper validation in ring buffer queue status

Source: https://junglewise.ai/threats/cve-2025-62620-improper-validation-of-unsafe-equivalence-in-input-could-allow-an  
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-2025-62620 · Severity: info · Published 2026-11-10

AMD EPYC processors use a ring buffer to manage queue status pages in virtualized environments. An attacker with high privileges on a guest virtual machine could exploit improper validation to reclaim the ring buffer queue status page, potentially compromising the memory integrity of other guests running on the same host.

Vendors: [Amd](https://junglewise.ai/threats/vendors/amd).

## Quick answers

**Is CVE-2025-62620 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-62620 being exploited in the wild.

**How severe is CVE-2025-62620?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** Amd EPYC <UNKNOWN>.

**Is there a fix for CVE-2025-62620?** 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-2025-62620 attacked?** It is attacked with local access, in device firmware.

**Am I affected by CVE-2025-62620?** Check whether you run Amd EPYC at an affected version. 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 ring buffer queue status page handling due to improper validation of unsafe equivalence in input. An attacker with high privilege level (guest-level access) can exploit this to reclaim the queue status page, leading to potential loss of guest memory integrity in shared virtualization scenarios. This is a logic flaw in input validation rather than a memory safety issue.

## Affected products

- AMD EPYC <UNKNOWN>

## 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 EPYC improper access control in debug interface](https://junglewise.ai/threats/cve-2025-54501-improper-access-control-on-an-internal-debug-interface-could)