CVE-2023-2875Public exploit

Local system crash via unvalidated kernel handle

Published May 24, 2023 · Updated Aug 2, 2024

NULL pointer dereference in eScan Antivirus 22.0.1400.2443 allows local users to crash Windows through a driver IOCTL request. The PROCOBSRVESX.SYS handler for IOCTL 0x22E008 passes an unvalidated kernel handle to ZwDuplicateObject, triggering the dereference. A normal local user can reach the driver interface without user interaction, and successful exploitation causes a Windows blue-screen crash.

CVSS severity5.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in eScan Antivirus 22.0.1400.2443 allows local users to crash Windows through a driver IOCTL request. The PROCOBSRVESX.SYS handler for IOCTL 0x22E008 passes an unvalidated kernel handle to ZwDuplicateObject, triggering the dereference. A normal local user can reach the driver interface without user interaction, and successful exploitation causes a Windows blue-screen crash.

The record

CVE
CVE-2023-2875
Published
May 24, 2023
Updated
Aug 2, 2024
Vendor
MicroWorld Technologies Inc.
Product
eScan Antivirus
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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  1. Affected versionversion=22.0.1400.2443

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

MicroWorld Technologies Inc. · eScan Antivirusversion=22.0.1400.2443

Published CVSS scores

4.6VulDBAV:L/AC:L/Au:S/C:N/I:N/A:C
5.5VulDBCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

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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