AMD: Security-Sensitive Hardware Controls with Missing Lock Bit Protection (CVE-2024-36309)
Published Last modified Sources: EUVD, CVE.org
What is affected, what to do
Missing Lock Bit Protection in the Northbridge IO (NBIO) could allow a privileged attacker to use an intentionally disabled device as part of a remapping attack potentially impacting data confidentiality, integrity, or availability.
The available sources name no fixed version. Check the vendor guidance in the references below.
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
4.6
XIEM Effective CVSS
Highest available CVSS rating from NVD and vendor data.
Source: Vendor (CNA), CVSS v4
4.6
CVSS v4
Severity Medium on the scale from 0 to 10.
Source: EUVD, CVE.org
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EPSS score
No value is available for this vulnerability.
Show all metrics
- Severity
- Medium
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 53.00 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 4.6 Methodology
CVSS v4
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 4.6
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-1233
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
Missing Lock Bit Protection in the Northbridge IO (NBIO) could allow a privileged attacker to use an intentionally disabled device as part of a remapping attack potentially impacting data confidentiality, integrity, or availability.
Source: ENISA EUVD, cvelistv5, CVE.org (MITRE), NVD (NIST)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
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| AMD | AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD EPYC™ 4004 Series Processors |
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| AMD | AMD EPYC™ 4005 Series Processors |
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| AMD | AMD EPYC™ 7001 Series Processors |
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| AMD | AMD EPYC™ 7002 Series Processors |
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| AMD | AMD EPYC™ 7003 Series Processors |
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| AMD | AMD EPYC™ 9004 Series Processors |
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| AMD | AMD EPYC™ 9005 Series Processors |
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| AMD | AMD EPYC™ Embedded 3000 Series Processors |
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| AMD | AMD EPYC™ Embedded 4005 Series Processors |
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| AMD | AMD EPYC™ Embedded 7002 Series Processors |
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| AMD | AMD EPYC™ Embedded 7003 Series Processors |
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| AMD | AMD EPYC™ Embedded 8004 Series Processors |
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| AMD | AMD EPYC™ Embedded 9004 Series Processors - Bergamo |
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| AMD | AMD EPYC™ Embedded 9004 Series Processors - Genoa |
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| AMD | AMD EPYC™ Embedded 9005 Series Processors |
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| AMD | AMD Instinct™ MI300A Series Processors |
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| AMD | AMD Ryzen™ 3000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 3000 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 4000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 5000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 7000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 7040 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 7045 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 8000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 8040 Series Mobile Processors with Radeon™ Graphics |
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| AMD | AMD Ryzen™ 9000 Series Desktop Processors |
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| AMD | AMD Ryzen™ 9000HX Series Mobile Processors |
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| AMD | AMD Ryzen™ AI 300 Series Processors |
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| AMD | AMD Ryzen™ AI Max 300 Series Processors |
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| AMD | AMD Ryzen™ Embedded 5000 Series Processors |
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| AMD | AMD Ryzen™ Embedded 7000 Series Processors |
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| AMD | AMD Ryzen™ Embedded 8000 Series Processors |
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| AMD | AMD Ryzen™ Embedded 9000 Series Processors |
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| AMD | AMD Ryzen™ Embedded R1000 Series Processors |
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| AMD | AMD Ryzen™ Embedded R2000 Series Processors |
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| AMD | AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Raven Ridge") |
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| AMD | AMD Ryzen™ Embedded V2000 Series Processors |
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| AMD | AMD Ryzen™ Embedded V3000 Series Processors |
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| AMD | AMD Ryzen™ Threadripper™ 3000 Processors |
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| AMD | AMD Ryzen™ Threadripper™ 7000 Processors |
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Vendors and products
- AMD Amd Athlon™ 3000 Series Mobile Processors With Radeon™ Graphics
- AMD Amd Epyc™ 4004 Series Processors
- AMD Amd Epyc™ 4005 Series Processors
- AMD Amd Epyc™ 7001 Series Processors
- AMD Amd Epyc™ 7002 Series Processors
- AMD Amd Epyc™ 7003 Series Processors
- AMD Amd Epyc™ 9004 Series Processors
- AMD Amd Epyc™ 9005 Series Processors
- AMD Amd Epyc™ Embedded 3000 Series Processors
- AMD Amd Epyc™ Embedded 4005 Series Processors
- AMD Amd Epyc™ Embedded 7002 Series Processors
- AMD Amd Epyc™ Embedded 7003 Series Processors
Weakness classes (CWE)
CWE-1233Security-Sensitive Hardware Controls with Missing Lock Bit Protection
Base
The product uses a register lock bit protection mechanism, but it does not ensure that the lock bit prevents modification of system registers or controls that perform changes to important hardware system configuration.
Entry at MITRE CWE-1233
References & sources
- amd.comen/resources/product-security/bulletin/AMD-SB-4018.htmleuvd
- amd.comen/resources/product-security/bulletin/AMD-SB-3051.htmleuvd
- NVD (NIST)vuln/detail/CVE-2024-36309euvd
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Receivedamd.com
CVSS V4.0: AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness type: CWE-1233
Description added or changed
Show 6 original changes
Individual changes of this event as published by NVD Type Action Before After Description added —Missing Lock Bit Protection in the Northbridge IO (NBIO) could allow a privileged attacker to use an intentionally disabled device as part of a remapping attack potentially impacting data confidentiality, integrity, or availability.CVSS added —AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XWeakness type (CWE) added —CWE-1233Affected versions (publisher) added —New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2024/36xxx/CVE-2024-36309.json">CVE-2024-36309</a>Reference added —https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-3051.htmlReference added —https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4018.htmlSource identifier: psirt@amd.com
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<a href="https://intel.neosec.eu/en/cve/CVE-2024-36309"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-36309.svg?lang=en" alt="CVE-2024-36309 – NEOSEC Intel" height="20"></a>