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Ideacentre C5 14imb05 FirmwareOperating system · Lenovo

CVE-2023-43580

MEDIUM · 6.7 CVSS v3.1 Published 2023-11-08
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 was reported in the SmuV11DxeVMR module in some Lenovo Desktop products that may allow a local attacker with 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 exists in the SmuV11DxeVMR UEFI firmware module in certain Lenovo Desktop products. A local attacker with elevated privileges can exploit the buffer overflow to execute arbitrary code on the affected system.

MitigationApply the Lenovo firmware update that addresses this vulnerability. Restrict local privileged access and monitor for indicators of compromise until the patch is applied.

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
Ideacentre C5 14imb05 FirmwareOperating system
Affected:< o4hkt3ca
Ideacentre 3 07ada05 FirmwareOperating system
Affected:< o4fkt39a
Ideacentre 3 07imb05 FirmwareOperating system
Affected:< m2vkt21a
Ideacentre 5 14iab7 FirmwareOperating system
Affected:< m42kt46a
Ideacentre 5 14irb8 FirmwareOperating system
Affected:< m4ukt36a
Ideacentre 5 14acn6 FirmwareOperating system
Affected:all versions
Ideacentre T540 15ama G FirmwareOperating system
Affected:all versions
Thinkcentre Neo 70t Gen 3 FirmwareOperating system
Affected:< m40kt45a

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 your Lenovo desktop model
    Locate the model label on the chassis or check system information ( BIOS setup or running 'systeminfo' on Windows or 'dmidecode' on Linux) to confirm the exact model number
    Affected if Model is one of: Ideacentre C5 14imb05, Ideacentre 3 07ada05, Ideacentre 3 07imb05, Ideacentre 5 14iab7, Ideacentre 5 14irb8, Ideacentre 5 14acn6, Ideacentre T540 15ama G, or Thinkcentre Neo 70t Gen 3
  2. Check installed UEFI firmware version
    Enter BIOS setup (press F1 or Del during boot) and look under 'BIOS Version' or 'Firmware Version' information screen. On Windows, you can also check via 'wmic bios get smbiosbiosversion'. On Linux, check 'dmidecode -s bios-version'
    Affected if The displayed firmware version is below the fixed version for your model, or for Ideacentre 5 14acn6 and T540 15ama G, any version present
  3. Confirm SmuV11DxeVMR module presence
    This is a UEFI firmware module. If you have UEFI firmware extraction tools (like UEFI Tool or chip-off reading), you can check if the SmuV11DxeVMR DXE driver is present in the firmware image. This step typically requires advanced forensic tools
    Affected if Model matches an affected product and firmware version is below threshold (o4hkt3ca for C5 14imb05, o4fkt39a for 07ada05, m2vkt21a for 07imb05, m42kt46a for 14iab7, m4ukt36a for 14irb8, or m40kt45a for Thinkcentre Neo 70t Gen 3); Ideacentre 5 14acn6 and T540 15ama G are affected at all versions

You are affected if your Lenovo desktop model matches one of the eight affected models AND your installed firmware version falls below the specified threshold (or any version for the two models with 'all versions' listed).

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 that addresses this vulnerability. Restrict local privileged access and monitor for indicators of compromise until the patch is applied.

Recommended fix High confidence

Update SMU firmware to the fixed versions: o4hkt3ca (C5 14imb05), o4fkt39a (07ada05), m2vkt21a (07imb05), m42kt46a (14iab7), m4ukt36a (14irb8), m40kt45a (Neo 70t Gen 3)

  1. 1. Identify the exact model number of the Lenovo desktop from the affected product list
  2. 2. Visit the Lenovo support website (support.lenovo.com) and navigate to the Drivers & Downloads section for your specific model
  3. 3. Locate the SMU (System Management Unit) firmware update for your model
  4. 4. For Ideacentre C5 14imb05: Update to firmware version o4hkt3ca or later
  5. 5. For Ideacentre 3 07ada05: Update to firmware version o4fkt39a or later
  6. 6. For Ideacentre 3 07imb05: Update to firmware version m2vkt21a or later
  7. 7. For Ideacentre 5 14iab7: Update to firmware version m42kt46a or later
  8. 8. For Ideacentre 5 14irb8: Update to firmware version m4ukt36a or later
Caveat Firmware updates carry inherent risk; power loss during update can render device inoperable - ensure stable power supply during update process

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

Fix this in Ideacentre C5 14imb05 Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,440
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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-2023-43580 in production — separate from our analysis above.

No notes yet

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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
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