How severe is CVE-2021-46764?

CVE-2021-46764 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-46764 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46764?

CVE-2021-46764 primarily affects Amd Epyc 72f3 Firmware. In total, 48 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46764?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-46764 published?

CVE-2021-46764 was published on 2023-05-09 and last updated on 2026-06-17.

CVE-2021-46764

CVE-2021-46764 is a high-severity vulnerability in Amd Epyc 72f3 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Amd Epyc 72f3 Firmware
Published: 2023-05-09
Last modified: 2026-06-17

Description

Improper validation of DRAM addresses in SMU may allow an attacker to overwrite sensitive memory locations within the ASP potentially resulting in a denial of service.

Frequently asked questions

What is CVE-2021-46764?: Improper validation of DRAM addresses in SMU may allow an attacker to overwrite sensitive memory locations within the ASP potentially resulting in a denial of service.
How severe is CVE-2021-46764?: CVE-2021-46764 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-46764 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46764?: CVE-2021-46764 primarily affects Amd Epyc 72f3 Firmware. In total, 48 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46764?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-46764 published?: CVE-2021-46764 was published on 2023-05-09 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001

Affected products (48)

cpe:2.3:o:amd:epyc_72f3_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7313_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7313p_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7343_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7373x_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_73f3_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7413_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7443_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7443p_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7453_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7473x_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_74f3_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7513_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7543_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7543p_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7573x_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_75f3_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7643_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7663_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7713_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7713p_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7763_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7773x_firmware:milanpi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7232p_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7252_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7262_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7272_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7282_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7302_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7302p_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7352_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7402_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7402p_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7452_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7502_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7502p_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7532_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7542_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7552_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:epyc_7642_firmware:romepi_1.0.0.e:*:*:*:*:*:*:*

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