CVE-2024-23851Public exploit

System crash via oversized device-mapper ioctl parameters

Published Jan 23, 2024 · Updated Nov 4, 2025

Denial of service in the Linux kernel through 6.7.1 allows local users to crash the system through a crafted device-mapper ioctl. copy_params in drivers/md/dm-ioctl.c forwards an unchecked param_kernel->data_size above INT_MAX to kvmalloc, triggering a kernel warning and crash. Access requires CAP_SYS_ADMIN in the initial namespace, effectively root privileges, and the demonstrated consequence is system availability loss only.

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

What happened

Denial of service in the Linux kernel through 6.7.1 allows local users to crash the system through a crafted device-mapper ioctl. copy_params in drivers/md/dm-ioctl.c forwards an unchecked param_kernel->data_size above INT_MAX to kvmalloc, triggering a kernel warning and crash. Access requires CAP_SYS_ADMIN in the initial namespace, effectively root privileges, and the demonstrated consequence is system availability loss only.

The record

CVE
CVE-2024-23851
Published
Jan 23, 2024
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
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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