CVE-2021-26382

An attacker with root account privileges can load any legitimately signed firmware image into the Audio Co-Processor (ACP,) irrespective of the respective signing key being declared as usable for authenticating an ACP firmware image, potentially resulting in a denial of service.

Published: 2022-07-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-26382 is rated Low Risk (20.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). 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-2021-26382

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 0.05% 0.18% +0.13%
2 2026-04-03 0.12% 0.05% -0.07%
3 2025-11-21 — 0.12% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-26382

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.4 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/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:H)
They need powerful rights—admin, root, or similar—before this pays off.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.8 3.6 [email protected]

Weakness enumeration for CVE-2021-26382

Affected software / configurations for CVE-2021-26382

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 ryzen_3_3200u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_3_3200u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_3250u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_3_3250u_firmware:*:*:*:*:*:*:*:*
amd ryzen_3_3300u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_3_3300u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_3500u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_5_3500u_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_3550h_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_5_3550h_firmware:*:*:*:*:*:*:*:*
amd ryzen_5_3580u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_5_3580u_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_3700u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_7_3700u_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_pro_3700u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_7_pro_3700u_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_3750h_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_7_3750h_firmware:*:*:*:*:*:*:*:*
amd ryzen_7_3780u_firmware < renoirpi-fp6_1.0.0.7 cpe:2.3:o:amd:ryzen_7_3780u_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-26382

cvelogic Threat Intelligence