Quick answers
- Is CVE-2026-28249 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-28249 being exploited in the wild.
- How severe is CVE-2026-28249?
- Informational severity, published 10 November 2026.
- Which products and versions are affected?
- AMD Secure Encrypted Virtualization (SEV).
- Is there a fix for CVE-2026-28249?
- 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-2026-28249 attacked?
- It is attacked with local access, in device firmware.
- Am I affected by CVE-2026-28249?
- Check whether you run Amd Secure Encrypted Virtualization (SEV). 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 is an improper preservation of consistency between independent representations of shared state in SEV firmware, affecting cache coherency for guest context pages. A malicious hypervisor with privileged access can exploit this to affect cache coherency, resulting in loss of integrity for guest data. The attack requires hypervisor-level access and no upstream fix information is currently available.
Affected products
- AMD Secure Encrypted Virtualization (SEV)
Timeline
- 2026-11-10: disclosed