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Legion 5 Pro 16iah7h FirmwareOperating system · Lenovo

CVE-2023-34419

MEDIUM · 6.7 CVSS v3.1 Published 2023-08-17
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A buffer overflow has been identified in the SetupUtility driver in some Lenovo Notebook products which may allow an attacker with local access and elevated privileges to execute arbitrary code.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A buffer overflow vulnerability in the SetupUtility driver (a UEFI/BIOS-level component) in certain Lenovo notebook computers allows a local attacker with elevated privileges to execute arbitrary code. The vulnerability requires local access and administrative/root-level privileges to exploit, limiting its attack surface but enabling complete system compromise if successfully exploited.

MitigationApply the Lenovo firmware update (BIOS update) for the SetupUtility driver to the affected notebook models. This is a vendor-supplied patch that must be obtained from Lenovo's support website and deployed via their recommended firmware update process.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Legion 5 Pro 16iah7h FirmwareOperating system
Affected:< j2cn51ww
Legion 5 Pro 16iah7 FirmwareOperating system
Affected:< j2cn51ww
Legion 5 Pro 16arh7 FirmwareOperating system
Affected:all versions
Legion 5 Pro 16arh7h FirmwareOperating system
Affected:all versions
Legion 5 15arh7 FirmwareOperating system
Affected:all versions
Legion 5 15arh7h FirmwareOperating system
Affected:all versions
Legion 5 15iah7h FirmwareOperating system
Affected:< j2cn51ww
Legion 5 15iah7 FirmwareOperating system
Affected:< j2cn51ww

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the exact Lenovo model number
    Check the device label on the bottom of the notebook or run 'wmic computersystem get model' from Windows or 'dmidecode -s system-product-name' from Linux
    Affected if The model is one of: Legion 5 Pro 16iah7h, Legion 5 Pro 16iah7, Legion 5 Pro 16arh7, Legion 5 Pro 16arh7h, Legion 5 15arh7, Legion 5 15arh7h, Legion 5 15iah7h, or Legion 5 15iah7
  2. Check the installed BIOS/firmware version
    From Windows, run 'wmic bios get smbiosbiosversion' or check the BIOS setup screen on boot. From Linux, run 'dmidecode -s bios-version'
    Affected if The firmware version is below j2cn51ww for models 16iah7h, 16iah7, 15iah7h, or 15iah7, OR any version for models 16arh7, 16arh7h, 15arh7, or 15arh7h (these are all affected)
  3. Confirm SetupUtility driver presence
    This is a UEFI-level driver. Check the BIOS/UEFI setup menu under 'Security' or 'Boot' options for SetupUtility, or inspect the firmware image via tools like UEFITool if you have raw firmware dump capability
    Affected if The SetupUtility driver is present in the UEFI firmware

You are affected if you have a listed Lenovo Legion model and your specific firmware version falls within the affected ranges, combined with the presence of the SetupUtility driver in your UEFI firmware.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the Lenovo firmware update (BIOS update) for the SetupUtility driver to the affected notebook models. This is a vendor-supplied patch that must be obtained from Lenovo's support website and deployed via their recommended firmware update process.

Recommended fix Moderate confidence

j2cn51ww (or later)

  1. 1. Identify the exact model number of the Lenovo Legion laptop from the affected product list
  2. 2. Determine the current firmware version installed on the device
  3. 3. For models Legion 5 Pro 16iah7h, Legion 5 Pro 16iah7, Legion 5 15iah7h, and Legion 5 15iah7: Navigate to Lenovo support website (support.lenovo.com) and download firmware version j2cn51ww or later
  4. 4. Follow Lenovo's standard firmware update procedure, which typically requires running the firmware update utility with administrator privileges
  5. 5. Restart the system after firmware update completes
  6. 6. For models listed as 'all versions' affected (Legion 5 Pro 16arh7, Legion 5 Pro 16arh7h, Legion 5 15arh7, Legion 5 15arh7h): Check Lenovo support periodically for firmware updates as the vendor may release patches in the future
Caveat Firmware updates carry inherent risks; ensure the device is connected to power during the update process and do not interrupt the update procedure

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Legion 5 Pro 16iah7h Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,130
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-34419 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data