CVE-2021-26352

Insufficient bound checks in System Management Unit (SMU) PCIe Hot Plug table may result in access/updates from/to invalid address space that could result in denial of service.

Published: 2022-05-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-26352 is rated Low Risk (33.2/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.13%). 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-2021-26352

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 2026-04-13 0.04% 0.13% +0.08%
2 2026-04-03 0.13% 0.04% -0.08%
3 2025-11-21 — 0.13% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-26352

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/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: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: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.
 1.8 3.6 [email protected]
4.9 2.0 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 6.9 [email protected]

Weakness enumeration for CVE-2021-26352

Affected software / configurations for CVE-2021-26352

Vendor Product Version Raw CPE
amd ryzen_5_2600_firmware — cpe:2.3:o:amd:ryzen_5_2600_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_2600x_firmware — cpe:2.3:o:amd:ryzen_5_2600x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_2700x_firmware — cpe:2.3:o:amd:ryzen_5_2700x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_2700_firmware — cpe:2.3:o:amd:ryzen_5_2700_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3600_firmware — cpe:2.3:o:amd:ryzen_5_3600_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_3600x_firmware — cpe:2.3:o:amd:ryzen_5_3600x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_3700x_firmware — cpe:2.3:o:amd:ryzen_7_3700x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_3800x_firmware — cpe:2.3:o:amd:ryzen_7_3800x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3900x_firmware — cpe:2.3:o:amd:ryzen_9_3900x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_3950x_firmware — cpe:2.3:o:amd:ryzen_9_3950x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_5950x_firmware — cpe:2.3:o:amd:ryzen_9_5950x_firmware:-:*:*:*:*:*:*:*
amd ryzen_9_5900x_firmware — cpe:2.3:o:amd:ryzen_9_5900x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_5800x_firmware — cpe:2.3:o:amd:ryzen_7_5800x_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_5700g_firmware — cpe:2.3:o:amd:ryzen_7_5700g_firmware:-:*:*:*:*:*:*:*
amd ryzen_7_5700ge_firmware — cpe:2.3:o:amd:ryzen_7_5700ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_5600g_firmware — cpe:2.3:o:amd:ryzen_5_5600g_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_5600x_firmware — cpe:2.3:o:amd:ryzen_5_5600x_firmware:-:*:*:*:*:*:*:*
amd ryzen_5_5600ge_firmware — cpe:2.3:o:amd:ryzen_5_5600ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_5300g_firmware — cpe:2.3:o:amd:ryzen_3_5300g_firmware:-:*:*:*:*:*:*:*
amd ryzen_3_5300ge_firmware — cpe:2.3:o:amd:ryzen_3_5300ge_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_2990wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_2990wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_2970wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_2970wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_2950x_firmware — cpe:2.3:o:amd:ryzen_threadripper_2950x_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_2920x_firmware — cpe:2.3:o:amd:ryzen_threadripper_2920x_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_3970x_firmware — cpe:2.3:o:amd:ryzen_threadripper_3970x_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_5995wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_5995wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_5975wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_5975wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_5965wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_5965wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_5955wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_5955wx_firmware:-:*:*:*:*:*:*:*
amd ryzen_threadripper_pro_5945wx_firmware — cpe:2.3:o:amd:ryzen_threadripper_pro_5945wx_firmware:-:*:*:*:*:*:*:*

References for CVE-2021-26352

cvelogic Threat Intelligence