CVE-2021-26328
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss...
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
NVD Score used
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.
- Record
CVE-2021-26328- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - Weakness
- CWE-358
- Updated
- 2026-11-02
CVE List
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.
- Record
CVE-2021-26328- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - Weakness
- CWE-358
- Updated
- 2026-11-02
EUVDEUVD-2021-13134
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.
- Record
EUVD-2021-13134- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-fg37-647w-pgrp
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss...
Failure to verify the mode of CPU execution at the time of SNP_INIT may lead to a potential loss of memory integrity for SNP guests.
- Record
GHSA-fg37-647w-pgrp- CVSS 3.1
- 4.4 Medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L - Weakness
- CWE-358
- Updated
- 2026-11-02
Affected products
- amd 3rd gen epyc
- amd epyc 7003 firmware
- amd epyc 72f3 firmware
- amd epyc 7313 firmware
- amd epyc 7313p firmware
- amd epyc 7343 firmware
- amd epyc 7373x firmware
- amd epyc 73f3 firmware
- amd epyc 7413 firmware
- amd epyc 7443 firmware
- amd epyc 7443p firmware
- amd epyc 7453 firmware
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History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26328 is a medium vulnerability (CVSS 4.4) in Amd 3rd Gen Epyc, published January 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 9th percentile. No source names a fixed version.