CVE-2024-56369Public exploit

Local kernel crash via refresh-rate arithmetic overflow

Published Jan 11, 2025 · Updated May 11, 2026

Divide-by-zero in the Linux kernel DRM modes code allows local users to crash the kernel through a crafted modesetting ioctl. In drm_mode_vrefresh(), chained 32-bit denominator multiplication can wrap to zero after the function checks only the original htotal and vtotal values. Access to a DRM device ioctl is required, and the resulting divide error interrupts kernel service without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in the Linux kernel DRM modes code allows local users to crash the kernel through a crafted modesetting ioctl. In drm_mode_vrefresh(), chained 32-bit denominator multiplication can wrap to zero after the function checks only the original htotal and vtotal values. Access to a DRM device ioctl is required, and the resulting divide error interrupts kernel service without reported data disclosure or modification.

The record

CVE
CVE-2024-56369
Published
Jan 11, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 11, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <47c8b6cf1d08f0ad40d7ea7b025442e51b35ee1f
  2. Affected versionversion=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <69fbb01e891701e6d04db1ddb5ad49e42c4dd963
  3. Affected versionversion=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <9398332f23fab10c5ec57c168b44e72997d6318e
  4. Affected versionversion=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <b39de5a71bac5641d0fda33d1cf5682d82cf1ae5
  5. Affected versionversion=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <e7c7b48a0fc5ed83baae400a1b15e33978c25d7f
  6. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <47c8b6cf1d08f0ad40d7ea7b025442e51b35ee1f; version=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <69fbb01e891701e6d04db1ddb5ad49e42c4dd963; version=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <9398332f23fab10c5ec57c168b44e72997d6318e; version=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <b39de5a71bac5641d0fda33d1cf5682d82cf1ae5; version=2f0e9d804935970a4ce0f58dd046b41881bfd8f3 <e7c7b48a0fc5ed83baae400a1b15e33978c25d7f; version=4.17

Published CVSS scores

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Application or System Exploitation

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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