How severe is CVE-2021-46763?

CVE-2021-46763 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 high, and availability none.

Is CVE-2021-46763 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46763?

CVE-2021-46763 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-2021-46763?

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-2021-46763 published?

CVE-2021-46763 was published on 2023-05-09 and last updated on 2026-06-17.

CVE-2021-46763

CVE-2021-46763 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: 0% (39th 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

Insufficient input validation in the SMU may enable a privileged attacker to write beyond the intended bounds of a shared memory buffer potentially leading to a loss of integrity.

Frequently asked questions

What is CVE-2021-46763?: Insufficient input validation in the SMU may enable a privileged attacker to write beyond the intended bounds of a shared memory buffer potentially leading to a loss of integrity.
How severe is CVE-2021-46763?: CVE-2021-46763 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 high, and availability none.
Is CVE-2021-46763 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46763?: CVE-2021-46763 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-2021-46763?: 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-2021-46763 published?: CVE-2021-46763 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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