CVE-2024-36347

kernel: hw:amd: Improper signature verification in AMD CPU ROM microcode patch loader

Published Jun 27, 2025 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious microcode, potentially resulting in loss of integrity of x86 instruction execution, loss of confidentiality and integrity of data in x86 CPU privileged context and compromise of SMM execution environment.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-54719 Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious microcode, potentially resulting in loss of integrity of x86 instruction execution, loss of confidentiality and integrity of data in x86 CPU privileged context and compromise of SMM execution environment.
Ubuntu USN Ubuntu USN USN-8177-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8179-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8177-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-8183-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-8184-1 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-8179-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-8185-1 Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN Ubuntu USN USN-8179-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8183-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8203-1 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-8204-1 Linux kernel (Raspberry Pi Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-8185-2 Linux kernel (Low Latency NVIDIA) vulnerabilities
Ubuntu USN Ubuntu USN USN-8179-4 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-8245-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8257-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-8258-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-8260-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-8261-1 Linux kernel (Xilinx) vulnerabilities
Ubuntu USN Ubuntu USN USN-8265-1 Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN Ubuntu USN USN-8440-1 Linux kernel (Azure) vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A flaw was found in AMD processors. This flaw allows an attacker with system administration privileges to exploit an issue in the signature verification in the AMD CPU ROM microcode patch loader, allowing the load of malicious microcode. This issue could impact the integrity of x86 instruction execution, confidentiality, and data integrity in x86 CPU-privileged context and compromise the SMM execution environment. Improper signature verification in AMD CPU ROM microcode patch loader may allow an attacker with local administrator privilege to load malicious microcode, potentially resulting in loss of integrity of x86 instruction execution, loss of confidentiality and integrity of data in x86 CPU privileged context and compromise of SMM execution environment.
Weaknesses CWE-347
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H'}

cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Description No description is available for this CVE. A flaw was found in AMD processors. This flaw allows an attacker with system administration privileges to exploit an issue in the signature verification in the AMD CPU ROM microcode patch loader, allowing the load of malicious microcode. This issue could impact the integrity of x86 instruction execution, confidentiality, and data integrity in x86 CPU-privileged context and compromise the SMM execution environment.
Type Values Removed Values Added
Description No description is available for this CVE.
Title kernel: hw:amd: Improper signature verification in AMD CPU ROM microcode patch loader
Weaknesses CWE-99
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H'}

threat_severity

Important

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMD
Published
Updated
Feb 26, 2026, 5:50 PM
Reserved
May 23, 2024, 7:44 PM
Status
Deferred
Published
Jun 27, 2025, 11:15 PM
Modified
Jun 17, 2026, 7:36 AM
Severity
Important
Public date
Mar 5, 2025, 12:00 AM