CVE-2021-26317

CVE-2021-26317 is a high-severity vulnerability in Amd Radeon Software 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.

Key facts

• Severity: High (CVSS 3.x base score 7.8)
• CVSS v2: 7.2
• EPSS exploit prediction: 0% (18th percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Amd Radeon Software
• Published: 2022-05-12
• Last modified: 2026-06-17

Description

Failure to verify the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resulting in a potential arbitrary code execution.

Frequently asked questions

What is CVE-2021-26317?

Failure to verify the protocol in SMM may allow an attacker to control the protocol and modify SPI flash resulting in a potential arbitrary code execution.

How severe is CVE-2021-26317?

CVE-2021-26317 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-2021-26317 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26317?

CVE-2021-26317 primarily affects Amd Radeon Software. In total, 74 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-26317?

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-2021-26317 published?

CVE-2021-26317 was published on 2022-05-12 and last updated on 2026-06-17.

References

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

Affected products (74)

• cpe:2.3:a:amd:radeon_software:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3_2200u_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5300g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5300ge_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600ge_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5600x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5700g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5700ge_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:athlon_3050ge_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:athlon_3150g_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:athlon_3150ge_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5800x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5800x3d_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5900x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_5950x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_3950x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_5900hs_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_5900hx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_5980hs_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_9_5980hx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3_2300u_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_3_3100_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_2920x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_2950x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_2970wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_2990wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_3960x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_3970x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_3990x_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_3945wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_3955wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_3975wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_3995wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_5945wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_5955wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_5965wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_5975wx_firmware:-:*:*:*:*:*:*:*
• cpe:2.3:o:amd:ryzen_threadripper_pro_5995wx_firmware:-:*:*:*:*:*:*:*

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