CVE-2024-23441Public exploit

Windows crash via unchecked IOCTL return value

Published Jan 29, 2024 · Updated Apr 20, 2026

Denial of service in the Vba32m64.sys driver in VirusBlokAda Vba32 Antivirus 3.36.0 allows local users to crash Windows. IOCTL 0x2220A7 routes output buffers of at least 0x2E bytes into sub_11B34, which dereferences a null return value without checking it. Low-privileged local access to the driver is sufficient, and successful exploitation produces a system-wide blue-screen crash without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in the Vba32m64.sys driver in VirusBlokAda Vba32 Antivirus 3.36.0 allows local users to crash Windows. IOCTL 0x2220A7 routes output buffers of at least 0x2E bytes into sub_11B34, which dereferences a null return value without checking it. Low-privileged local access to the driver is sufficient, and successful exploitation produces a system-wide blue-screen crash without reported data disclosure or modification.

The record

CVE
CVE-2024-23441
Published
Jan 29, 2024
Updated
Apr 20, 2026
Vendor
VirusBlokAda
Product
Vba32 Antivirus
Classifications
CWE-476, CAPEC-212, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=3.36.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

VirusBlokAda · Vba32 Antivirusversion=3.36.0

Published CVSS scores

5.5Fluid AttacksCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
CAPEC-212Functionality Misuse
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo