CVE-2023-38043Public exploit

Kernel code execution via user-controlled IOCTL pointer

Published Nov 14, 2023 · Updated Aug 12, 2024

Local privilege escalation in Ivanti Secure Access Client before 22.6R1.1 allows local users to execute code in the Windows kernel. The jnprva.sys handler for IOCTL 0x8000204C treats caller-controlled bytes as an IO_CSQ pointer and passes it to IoCsqRemoveIrp, which invokes function pointers in that structure. A local unprivileged session is sufficient to direct kernel control flow, enabling privilege escalation or a system crash.

CVSS severity8.8
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in Ivanti Secure Access Client before 22.6R1.1 allows local users to execute code in the Windows kernel. The jnprva.sys handler for IOCTL 0x8000204C treats caller-controlled bytes as an IO_CSQ pointer and passes it to IoCsqRemoveIrp, which invokes function pointers in that structure. A local unprivileged session is sufficient to direct kernel control flow, enabling privilege escalation or a system crash.

The record

CVE
CVE-2023-38043
Published
Nov 14, 2023
Updated
Aug 12, 2024
Vendor
Ivanti
Product
Ivanti Secure Access Client
Classifications
CWE-400, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=0 <22.6R1.1
  2. Affected versionversion=22.6R1.1 <22.6R1.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Ivanti · Ivanti Secure Access Clientversion=0 <22.6R1.1; version=22.6R1.1 <22.6R1.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8HackerOneCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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-400Uncontrolled Resource Consumption
T1068Exploitation for Privilege Escalation

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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