CVE-2025-37771

System crash via overflowing fan-speed divisor

Published May 1, 2025 · Updated May 11, 2026

Division by zero in the Linux kernel's Arcturus AMD GPU fan-control code allows local users to crash the system via a crafted fan speed. The arcturus_set_fan_speed_rpm function multiplies an unchecked 32-bit speed by eight, allowing integer wraparound to produce a zero divisor in the tach-period calculation. Exploitation requires low-privilege local access and an affected Arcturus GPU path; the reported consequence is availability loss, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Division by zero in the Linux kernel's Arcturus AMD GPU fan-control code allows local users to crash the system via a crafted fan speed. The arcturus_set_fan_speed_rpm function multiplies an unchecked 32-bit speed by eight, allowing integer wraparound to produce a zero divisor in the tach-period calculation. Exploitation requires low-privilege local access and an affected Arcturus GPU path; the reported consequence is availability loss, not data access or modification.

The record

CVE
CVE-2025-37771
Published
May 1, 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. May 1, 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=5.15
  2. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <402964994e8ece29702383b234fabcf04791ff95
  3. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <5096174074114f83c700a27869c54362cbb10f3e
  4. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <6413fed016208171592c88b5df002af8a1387e24
  5. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <7d641c2b83275d3b0424127b2e0d2d0f7dd82aef
  6. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <b7c41df4913789ebfe73cc1e17c6401d4c5eab69
  7. Affected versionversion=b64625a303de727498f80f8cb9833fc615c0a90f <baa54adb5e0599299b8f088efb5544d876a3eb62

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=b64625a303de727498f80f8cb9833fc615c0a90f <402964994e8ece29702383b234fabcf04791ff95; version=b64625a303de727498f80f8cb9833fc615c0a90f <5096174074114f83c700a27869c54362cbb10f3e; version=b64625a303de727498f80f8cb9833fc615c0a90f <6413fed016208171592c88b5df002af8a1387e24; version=b64625a303de727498f80f8cb9833fc615c0a90f <7d641c2b83275d3b0424127b2e0d2d0f7dd82aef; version=b64625a303de727498f80f8cb9833fc615c0a90f <b7c41df4913789ebfe73cc1e17c6401d4c5eab69; version=b64625a303de727498f80f8cb9833fc615c0a90f <baa54adb5e0599299b8f088efb5544d876a3eb62

Published CVSS scores

5.5UbuntuCVSS: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

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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 exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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