CVE-2024-40431Public exploit

Local privilege escalation via unchecked buffer offset

Published Oct 23, 2024 · Updated Oct 24, 2024

Arbitrary kernel-memory write in Realtek RtsPer.sys before 10.0.26100.21374 allows local users to overwrite kernel data through a device control. The IOCTL_SCSI_PASS_THROUGH handler adds an unchecked 64-bit DataBufferOffset to IRP::SystemBuffer, redirecting a SCSI response copy to a chosen kernel address. A low-privileged account can pair the flaw with a kernel-stack leak to predict the buffer address and disable driver-signature enforcement.

CVSS severity8.8
High
EPSS probability1.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary kernel-memory write in Realtek RtsPer.sys before 10.0.26100.21374 allows local users to overwrite kernel data through a device control. The IOCTL_SCSI_PASS_THROUGH handler adds an unchecked 64-bit DataBufferOffset to IRP::SystemBuffer, redirecting a SCSI response copy to a chosen kernel address. A low-privileged account can pair the flaw with a kernel-stack leak to predict the buffer address and disable driver-signature enforcement.

The record

CVE
CVE-2024-40431
Published
Oct 23, 2024
Updated
Oct 24, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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.

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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

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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