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NVD / CVE Program· CNA lenovo

CVE-2023-43574: A buffer over-read was reported in the LEMALLDriversConnectedEventHook module in some Lenovo Desktop products that may allow a local attacke

Noroxi assessment

Priority: Monitor (action score 17/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.22% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A buffer over-read was reported in the LEMALLDriversConnectedEventHook module in some Lenovo Desktop products that may allow a local attacker with elevated privileges to disclose sensitive information.

MediumCVSS 4.4 · v3.1—No exploit No fix recorded
Published
Nov 8, 2023
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
4.4
CNA · lenovo
4.4
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-43574

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
lenovoideacentre c5-14imb05 firmware
lenovoideacentre c5-14imb05
lenovoideacentre 3-07ada05 firmware
lenovoideacentre 3-07ada05
lenovoideacentre 3-07imb05 firmware
lenovoideacentre 3-07imb05
lenovoideacentre 5 14iab7 firmware
lenovoideacentre 5 14iab7
lenovoideacentre 5 14irb8 firmware
lenovoideacentre 5 14irb8
lenovoideacentre 5-14acn6 firmware
lenovoideacentre 5-14acn6

and 188 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • lenovo ideacentre 3-07ada05 firmwarebefore o4fkt39a
  • lenovo ideacentre 3-07imb05 firmwarebefore m2vkt21a
  • lenovo ideacentre 5 14iab7 firmwarebefore m42kt46a
  • lenovo ideacentre 5 14irb8 firmwarebefore m4ukt36a
  • lenovo ideacentre 5-14acn6 firmwareall versions
  • lenovo ideacentre 5-14imb05 firmwarebefore o4hkt3ca
  • lenovo ideacentre 5-14iob6 firmwarebefore m3gkt3da
  • lenovo ideacentre aio 3 21itl7 firmwarebefore o5akt34a
  • lenovo ideacentre aio 3 22iap7 firmwarebefore o5nkt33a
  • lenovo ideacentre aio 3 24iap7 firmwarebefore o5nkt33a
  • lenovo ideacentre aio 3 27iap7 firmwarebefore o5nkt33a
  • lenovo ideacentre aio 3-22iil5 firmwarebefore o56kt24a
  • lenovo ideacentre aio 3-22imb05 firmwarebefore o4rkt31a
  • lenovo ideacentre aio 3-22itl6 firmwarebefore o5akt34a
  • lenovo ideacentre aio 3-24alc6 firmwarebefore o5bkt25a
  • lenovo ideacentre aio 3-24iil5 firmwarebefore o56kt24a
  • lenovo ideacentre aio 3-24imb05 firmwarebefore o4rkt31a
  • lenovo ideacentre aio 3-24itl6 firmwarebefore o5akt34a
  • lenovo ideacentre aio 3-27imb05 firmwarebefore o4rkt31a
  • lenovo ideacentre aio 3-27itl6 firmwarebefore o5akt34a

Versions reported by the vendor

Affected version ranges reported by the assigning authority (lenovo). Independent of NVD's CPE analysis and usually ahead of it.

  • Lenovo Desktop BIOS

    • variousaffected

Same product

lenovo: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-48181An ErrorMessage driver stack-based buffer overflow vulnerability in BIOS of some ThinkPad models could allow an attacker with local access t
    31Monitor
  • CVE-2023-45079A memory leakage vulnerability was reported in the NvmramSmm SMM driver that may allow a local attacker with elevated privileges to write to
    26Monitor
  • CVE-2023-45078A memory leakage vulnerability was reported in the DustFilterAlertSmm SMM driver that may allow a local attacker with elevated privileges to
    26Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2023-43572Nov 8, 2023 · A buffer over-read was reported in the BiosExtensionLoader module in some Lenovo Desktop products that may allow a local attacker with eleva
    17Monitor
  • ← EarlierCVE-2023-43573Nov 8, 2023 · A buffer overflow was reported in the LEMALLDriversConnectedEventHook module in some Lenovo Desktop products that may allow a local attacker
    26Monitor
  • Later →CVE-2023-43575Nov 8, 2023 · A buffer overflow was reported in the UltraFunctionTable module in some Lenovo Desktop products that may allow a local attacker with elevate
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2023-435680 days apartA buffer over-read was reported in the LemSecureBootForceKey module in some Lenovo Desktop products that may allow a local attacker with ele
    17Monitor
  • CVE-2023-435720 days apartA buffer over-read was reported in the BiosExtensionLoader module in some Lenovo Desktop products that may allow a local attacker with eleva
    17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-126 · Buffer Over-read

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records