CVE-2023-4891

Local denial of service via use-after-free

Published Nov 8, 2023 · Updated Sep 3, 2024

Use-after-free in Lenovo View Driver before 2.3.18.1 allows local users to interrupt service through the affected driver. The driver accesses memory after freeing it, but Lenovo has not disclosed the affected routine, freed object, or triggering input sequence. Reaching the flaw requires local low-privilege access and no user interaction; denial of service is the only documented consequence, and its exact form is undisclosed.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Lenovo View Driver before 2.3.18.1 allows local users to interrupt service through the affected driver. The driver accesses memory after freeing it, but Lenovo has not disclosed the affected routine, freed object, or triggering input sequence. Reaching the flaw requires local low-privilege access and no user interaction; denial of service is the only documented consequence, and its exact form is undisclosed.

The record

CVE
CVE-2023-4891
Published
Nov 8, 2023
Updated
Sep 3, 2024
Vendor
Lenovo
Product
Lenovo View Driver
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Versions prior to 2.3.18.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Lenovo · Lenovo View Driverversion=Versions prior to 2.3.18.1

Published CVSS scores

5.5Lenovo Group Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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