CVE-2021-26311
AMD Secure Encrypted Virtualization
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
- Record
CVE-2021-26311- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Weakness
- CWE-77
- Updated
- 2026-11-02
CVE List No score
AMD Secure Encrypted Virtualization
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
- Record
CVE-2021-26311- Updated
- 2026-11-02
EUVDEUVD-2021-13117 No score
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
- Record
EUVD-2021-13117- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2v8q-5wcx-2f5j No score
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not...
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
- Record
GHSA-2v8q-5wcx-2f5j- Weakness
- CWE-77
- Updated
- 2026-11-02
Affected products
- amd sev/sev-es
- amd epyc 7232p
- amd epyc 7251
- amd epyc 7252
- amd epyc 7261
- amd epyc 7262
- amd epyc 7272
- amd epyc 7281
- amd epyc 7282
- amd epyc 72f3
- amd epyc 7301
- amd epyc 7302
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- amd epyc 7302p
- amd epyc 7313
- amd epyc 7313p
- amd epyc 7343
- amd epyc 7351
- amd epyc 7351p
- amd epyc 7352
- amd epyc 7371
- amd epyc 73f3
- amd epyc 7401
- amd epyc 7401p
- amd epyc 7402
- amd epyc 7402p
- amd epyc 7413
- amd epyc 7443
- amd epyc 7443p
- amd epyc 7451
- amd epyc 7452
- amd epyc 7453
- amd epyc 74f3
- amd epyc 7501
- amd epyc 7502
- amd epyc 7502p
- amd epyc 7513
- amd epyc 7532
- amd epyc 7542
- amd epyc 7543
- amd epyc 7543p
- amd epyc 7551
- amd epyc 7551p
- amd epyc 7552
- amd epyc 75f3
- amd epyc 7601
- amd epyc 7642
- amd epyc 7643
- amd epyc 7662
- amd epyc 7663
- amd epyc 7702
- amd epyc 7702p
- amd epyc 7713
- amd epyc 7713p
- amd epyc 7742
- amd epyc 7763
- amd epyc 7f32
- amd epyc 7f52
- amd epyc 7f72
- amd epyc 7h12
- amd epyc embedded 3101
- amd epyc embedded 3151
- amd epyc embedded 3201
- amd epyc embedded 3251
- amd epyc embedded 3255
- amd epyc embedded 3351
- amd epyc embedded 3451
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26311 is a high vulnerability (CVSS 7.2) in Amd Sev/sev-es, published May 13, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.68%, the 77th percentile. No source names a fixed version.