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.

Published: 2022-07-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-26384 is rated Low Risk (34.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-26384

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.19% +0.13%
2 2025-03-17 0.04% 0.06% +0.02%
3 2023-03-07 — 0.04% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-26384

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]

Weakness enumeration for CVE-2021-26384

Affected software / configurations for CVE-2021-26384

Vendor Product Version Raw CPE
amd ryzen_7_5700g_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_5700g_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5700ge_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_5700ge_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5600g_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_5600g_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5600ge_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_5600ge_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5300g_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_3_5300g_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5300ge_firmware < comboam4_v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_3_5300ge_firmware:*:*:*:*:*:*:*:*
amd ryzen_9_5980hx_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_9_5980hx_firmware:*:*:*:*:*:*:*:*
amd ryzen_9_5980hs_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_9_5980hs_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5825u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_7_5825u_firmware:*:*:*:*:*:*:*:*
amd ryzen_9_5900hx_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_9_5900hx_firmware:*:*:*:*:*:*:*:*
amd ryzen_9_5900hs_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_9_5900hs_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5825c_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_7_5825c_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5800h_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_7_5800h_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5625u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5625u_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5800hs_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_7_5800hs_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5625c_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5625c_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5600h_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5600h_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5600hs_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5600hs_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_5800u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_7_5800u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5600u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5600u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_5560u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_5_5560u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5425u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_3_5425u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5425c_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_3_5425c_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5400u_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_3_5400u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_5125c_firmware < cezannepi-fp6_1.0.0.9 cpe:2.3:o:amd:ryzen_3_5125c_firmware:*:*:*:*:*:*:*:*
amd athlon_silver_3050u_firmware — cpe:2.3:o:amd:athlon_silver_3050u_firmware:-:*:*:*:*:*:*:*
amd athlon_gold_3150u_firmware — cpe:2.3:o:amd:athlon_gold_3150u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3200u_firmware — cpe:2.3:o:amd:ryzen_3_3200u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3250u_firmware — cpe:2.3:o:amd:ryzen_3_3250u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3300u_firmware — cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3350u_firmware — cpe:2.3:o:amd:ryzen_3_3350u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3450u_firmware — cpe:2.3:o:amd:ryzen_3_3450u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3500u_firmware — cpe:2.3:o:amd:ryzen_3_3500u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3500c_firmware — cpe:2.3:o:amd:ryzen_3_3500c_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3550h_firmware — cpe:2.3:o:amd:ryzen_3_3550h_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3580u_firmware — cpe:2.3:o:amd:ryzen_3_3580u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3700u_firmware — cpe:2.3:o:amd:ryzen_3_3700u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3700c_firmware — cpe:2.3:o:amd:ryzen_3_3700c_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3750h_firmware — cpe:2.3:o:amd:ryzen_3_3750h_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_3780u_firmware — cpe:2.3:o:amd:ryzen_3_3780u_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_2200u_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_3_2200u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_2300u_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_3_2300u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2500u_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2500u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2600_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2600_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2600h_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2600h_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2600x_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2600x_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2700_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2700_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_2700x_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_5_2700x_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_2700_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_2700_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_2700u_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_2700u_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_2700x_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_2700x_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_2800h_firmware < comboam4v2_pi_1.2.0.6c cpe:2.3:o:amd:ryzen_7_2800h_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-26384

cvelogic Threat Intelligence