CVE-2021-26342

LOW

3.3

CVSS Score

Published: May 11, 2022 at 04:21 PM UTC

Updated: June 17, 2026 at 03:43 AM UTC

77 products affected across 1 vendorEpyc 7663 FirmwareEpyc 7713P FirmwareEpyc 7413 Firmware

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Severity

LOW3.3

Exploit prediction

EPSS 0.2%

Description

In SEV guest VMs, the CPU may fail to flush the Translation Lookaside Buffer (TLB) following a particular sequence of operations that includes creation of a new virtual machine control block (VMCB). The failure to flush the TLB may cause the microcode to use stale TLB translations which may allow for disclosure of SEV guest memory contents. Users of SEV-ES/SEV-SNP guest VMs are not impacted by this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Epyc 7001 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7001 (same device)

Epyc 7251 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7251 (same device)

Epyc 7261 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7261 (same device)

Epyc 7281 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7281 (same device)

Epyc 72F3 Firmware · AMD

95%

v < milanpi-sp3_1.0.0.7

Affected range stops below milanpi-sp3_1.0.0.7, so it looks safe — our inference, not a vendor statement

amd-epyc-72f3 (same device)

Epyc 7301 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7301 (same device)

Epyc 7313 Firmware · AMD

95%

v < milanpi-sp3_1.0.0.7

Affected range stops below milanpi-sp3_1.0.0.7, so it looks safe — our inference, not a vendor statement

amd-epyc-7313 (same device)

Epyc 7313P Firmware · AMD

95%

v < milanpi-sp3_1.0.0.7

Affected range stops below milanpi-sp3_1.0.0.7, so it looks safe — our inference, not a vendor statement

amd-epyc-7313p (same device)

Epyc 7343 Firmware · AMD

95%

v < milanpi-sp3_1.0.0.7

Affected range stops below milanpi-sp3_1.0.0.7, so it looks safe — our inference, not a vendor statement

amd-epyc-7343 (same device)

Epyc 7351 Firmware · AMD

95%

v < naplespi-sp3_1.0.0.h

Affected range stops below naplespi-sp3_1.0.0.h, so it looks safe — our inference, not a vendor statement

amd-epyc-7351 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1028

CVSS

3.3LOW[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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