How severe is CVE-2021-26384?

CVE-2021-26384 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-26384 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26384?

CVE-2021-26384 primarily affects Amd Ryzen 7 5700g Firmware. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26384?

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-2021-26384 published?

CVE-2021-26384 was published on 2022-07-14 and last updated on 2026-06-17.

CVE-2021-26384

CVE-2021-26384 is a high-severity vulnerability in Amd Ryzen 7 5700g Firmware with a CVSS 3.x base score of 7.8. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Amd Ryzen 7 5700g Firmware
Published: 2022-07-14
Last modified: 2026-06-17

Description

A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.

Frequently asked questions

What is CVE-2021-26384?: A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.
How severe is CVE-2021-26384?: CVE-2021-26384 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-26384 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26384?: CVE-2021-26384 primarily affects Amd Ryzen 7 5700g Firmware. In total, 52 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-26384?: 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-2021-26384 published?: CVE-2021-26384 was published on 2022-07-14 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1027

Affected products (52)

cpe:2.3:o:amd:ryzen_7_5700g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5560u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5400u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5125c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_silver_3050u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_gold_3150u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3200u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3350u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3450u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3580u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3750h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3780u_firmware:-:*:*:*:*:*:*:*

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CVE-2023-20559 — High (CVSS 8.8): Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM…
CVE-2023-20558 — High (CVSS 8.8): Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler…
CVE-2021-26365 — High (CVSS 8.2): Certain size values in firmware binary headers could trigger out of bounds reads during signature validation, leading…
CVE-2023-20571 — High (CVSS 8.1): A race condition in System Management Mode (SMM) code may allow an attacker using a compromised user space to leverage…
CVE-2023-20565 — High (CVSS 7.8): Insufficient protections in System Management Mode (SMM) code may allow an attacker to potentially enable escalation of…

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CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
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