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    CVE-2021-46755

    Failure to unmap certain SysHub mappings in error paths of the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious bootloader to exhaust the SysHub resources resulting in a potential denial of service.

    Published:May 9, 2023
    Last Modified:Jan 28, 2025
    EPS:May 9, 2023
    EPSS Score:0.00158
    CVSS Score:7.5

    Affected Products

    Vendor
    Amd
    Product
    Ryzen 3100
    Vendor
    Amd
    Product
    Ryzen 3100 Firmware
    Vendor
    Amd
    Product
    Ryzen 3300x
    Vendor
    Amd
    Product
    Ryzen 3300x Firmware
    Vendor
    Amd
    Product
    Ryzen 3500
    Vendor
    Amd
    Product
    Ryzen 3500 Firmware
    Vendor
    Amd
    Product
    Ryzen 3500x
    Vendor
    Amd
    Product
    Ryzen 3500x Firmware
    Vendor
    Amd
    Product
    Ryzen 3600
    Vendor
    Amd
    Product
    Ryzen 3600 Firmware
    Vendor
    Amd
    Product
    Ryzen 3600x
    Vendor
    Amd
    Product
    Ryzen 3600x Firmware
    Vendor
    Amd
    Product
    Ryzen 3600xt
    Vendor
    Amd
    Product
    Ryzen 3600xt Firmware
    Vendor
    Amd
    Product
    Ryzen 3800x
    Vendor
    Amd
    Product
    Ryzen 3800x Firmware
    Vendor
    Amd
    Product
    Ryzen 3800xt
    Vendor
    Amd
    Product
    Ryzen 3800xt Firmware
    Vendor
    Amd
    Product
    Ryzen 3900
    Vendor
    Amd
    Product
    Ryzen 3900 Firmware
    Vendor
    Amd
    Product
    Ryzen 3900x
    Vendor
    Amd
    Product
    Ryzen 3900x Firmware
    Vendor
    Amd
    Product
    Ryzen 3900xt
    Vendor
    Amd
    Product
    Ryzen 3900xt Firmware
    Vendor
    Amd
    Product
    Ryzen 3950x
    Vendor
    Amd
    Product
    Ryzen 3950x Firmware
    Vendor
    Amd
    Product
    Ryzen 5500
    Vendor
    Amd
    Product
    Ryzen 5500 Firmware
    Vendor
    Amd
    Product
    Ryzen 5600
    Vendor
    Amd
    Product
    Ryzen 5600 Firmware
    Vendor
    Amd
    Product
    Ryzen 5600g
    Vendor
    Amd
    Product
    Ryzen 5600g Firmware
    Vendor
    Amd
    Product
    Ryzen 5600x
    Vendor
    Amd
    Product
    Ryzen 5600x Firmware
    Vendor
    Amd
    Product
    Ryzen 5700g
    Vendor
    Amd
    Product
    Ryzen 5700g Firmware
    Vendor
    Amd
    Product
    Ryzen 5700x
    Vendor
    Amd
    Product
    Ryzen 5700x Firmware
    Vendor
    Amd
    Product
    Ryzen 5800x
    Vendor
    Amd
    Product
    Ryzen 5800x3d
    Vendor
    Amd
    Product
    Ryzen 5800x3d Firmware
    Vendor
    Amd
    Product
    Ryzen 5800x Firmware
    Vendor
    Amd
    Product
    Ryzen 5900x
    Vendor
    Amd
    Product
    Ryzen 5900x Firmware
    Vendor
    Amd
    Product
    Ryzen 5950x
    Vendor
    Amd
    Product
    Ryzen 5950x Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2023-20597 (CVSS 5.5) — Improper initialization of variables in the DXE driver may allow a privileged user to leak sensitive informati…
    CVE-2023-20594 (CVSS 4.4) — Improper initialization of variables in the DXE driver may allow a privileged user to leak sensitive informati…
    CVE-2021-46794 (CVSS 7.5) — Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System …
    CVE-2021-46792 (CVSS 5.9) — Time-of-check Time-of-use (TOCTOU) in the BIOS2PSP command may allow an attacker with a malicious BIOS to crea…
    CVE-2021-46773 (CVSS 8.8) — Insufficient input validation in ABL may enable a privileged attacker to corrupt ASP memory, potentially resul…
    CVE-2021-46765 (CVSS 7.5) — Insufficient input validation in ASP may allow an attacker with a compromised SMM to induce out-of-bounds memo…
    CVE-2021-46759 (CVSS 6.1) — Improper syscall input validation in AMD TEE (Trusted Execution Environment) may allow an attacker with physic…
    CVE-2021-46754 (CVSS 9.1) — Insufficient input validation in the ASP (AMD Secure Processor) bootloader may allow an attacker with a compro…
    CVE-2021-46753 (CVSS 9.1) — Failure to validate the length fields of the ASP (AMD Secure Processor) sensor fusion hub headers may allow an…
    CVE-2021-46749 (CVSS 7.5) — Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System …

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High