How severe is CVE-2022-23821?

CVE-2022-23821 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-23821 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-23821?

CVE-2022-23821 primarily affects Amd Ryzen 9 3900 Firmware. In total, 126 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-23821?

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

When was CVE-2022-23821 published?

CVE-2022-23821 was published on 2023-11-14 and last updated on 2026-06-17.

CVE-2022-23821

CVE-2022-23821 is a critical-severity vulnerability in Amd Ryzen 9 3900 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Amd Ryzen 9 3900 Firmware
Published: 2023-11-14
Last modified: 2026-06-17

Description

Improper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.

Frequently asked questions

What is CVE-2022-23821?: Improper access control in System Management Mode (SMM) may allow an attacker to write to SPI ROM potentially leading to arbitrary code execution.
How severe is CVE-2022-23821?: CVE-2022-23821 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-23821 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-23821?: CVE-2022-23821 primarily affects Amd Ryzen 9 3900 Firmware. In total, 126 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-23821?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-23821 published?: CVE-2022-23821 was published on 2023-11-14 and last updated on 2026-06-17.

References

Affected products (126)

cpe:2.3:o:amd:ryzen_9_3900_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900xt_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3900xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3950x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_3950x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3700x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3700x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800xt_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_3800xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3500x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600xt_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_3600xt_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3100_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3100_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300x_firmware:comboam4_pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5950x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_pro_5945_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_pro_5845_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600x_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_56003xd_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_pro_5645_firmware:comboam4_v2_pi_1.2.0.8:*:*:*:*:*:*:*

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