# CVE-2026-0435: AMD Secure Encrypted Virtualization firmware use-after-free

Source: https://junglewise.ai/threats/cve-2026-0435-operation-on-a-resource-after-expiration-or-release-in-the-amd  
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-2026-0435 · Severity: info · Published 2026-11-10

AMD's Secure Encrypted Virtualization (SEV) firmware contains a use-after-free vulnerability that allows an administrator to swap out a guest virtual machine's device without the guest's knowledge. This could compromise the confidentiality and integrity of data processed by the guest system, as a malicious administrator could intercept or manipulate I/O operations.

Technologies: [Amd Secure Encrypted Virtualization (SEV) firmware](https://junglewise.ai/threats/technologies/secure-encrypted-virtualization-sev-firmware). Vendors: [Amd](https://junglewise.ai/threats/vendors/amd).

## Quick answers

**Is CVE-2026-0435 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-0435 being exploited in the wild.

**How severe is CVE-2026-0435?** Informational severity, published 10 November 2026.

**Which products and versions are affected?** AMD Secure Encrypted Virtualization (SEV) firmware.

**Is there a fix for CVE-2026-0435?** 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-2026-0435 attacked?** It is attacked from the adjacent network, in device firmware.

**Am I affected by CVE-2026-0435?** Check whether you run Amd Secure Encrypted Virtualization (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 is a use-after-free condition in AMD SEV firmware where a resource is accessed after it has been freed or released. An attacker with administrative privileges on the hypervisor could exploit this to manipulate guest device assignments, potentially allowing unauthorized access to guest data or tampering with guest I/O operations.

## Affected products

- AMD Secure Encrypted Virtualization (SEV) firmware

## References

- [https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html](https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3038.html)

## Related threats

- [AMD SEV firmware downgrade in ASP Bootloader](https://junglewise.ai/threats/cve-2026-0003-use-of-a-per-part-static-key-in-the-asp-bootloader-could-allow-an)
- [AMD Secure Encrypted Virtualization off-by-one error in firmware](https://junglewise.ai/threats/cve-2026-40669-an-off-by-one-error-in-amd-secure-encrypted-virtualization-sev)
- [AMD Secure Encrypted Virtualization SEV firmware integrity weakness](https://junglewise.ai/threats/cve-2026-28248-improper-enforcement-of-behavioral-workflow-in-amd-secure)
- [AMD SEV firmware access control bypass in trusted region](https://junglewise.ai/threats/cve-2025-54504-insufficient-granularity-of-access-control-in-amd-secure)