CVE-2025-37769

Local service interruption via oversized fan speed

Published May 1, 2025 · Updated May 11, 2026

Divide-by-zero in affected Linux kernel branches starting at 6.0 allows local users to interrupt service via an oversized AMD SMU11 fan speed. In smu_v11_0_set_fan_speed_rpm(), 8 * speed is evaluated without rejecting values above UINT_MAX/8, allowing the denominator to wrap to zero. Reachability requires local low-privileged access and an AMD GPU using the SMU11 path; the resulting kernel fault affects availability only.

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

Divide-by-zero in affected Linux kernel branches starting at 6.0 allows local users to interrupt service via an oversized AMD SMU11 fan speed. In smu_v11_0_set_fan_speed_rpm(), 8 * speed is evaluated without rejecting values above UINT_MAX/8, allowing the denominator to wrap to zero. Reachability requires local low-privileged access and an AMD GPU using the SMU11 path; the resulting kernel fault affects availability only.

The record

CVE
CVE-2025-37769
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499
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=1e866f1fe528bc0158cdcd589053753032bdb52c <63a150400194592206817124268ff6f43947e8c9
  2. Affected versionversion=1e866f1fe528bc0158cdcd589053753032bdb52c <7ba88b5cccc1a99c1afb96e31e7eedac9907704c
  3. Affected versionversion=1e866f1fe528bc0158cdcd589053753032bdb52c <de2cba068c9c648503973b57696d035cfe58a9f6
  4. Affected versionversion=1e866f1fe528bc0158cdcd589053753032bdb52c <de6f8e0534cfabc528c969d453150ca90b24fb01
  5. Affected versionversion=1e866f1fe528bc0158cdcd589053753032bdb52c <fc9d55377353321e78f9e108d15f72a17e8c6ee2
  6. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1e866f1fe528bc0158cdcd589053753032bdb52c <63a150400194592206817124268ff6f43947e8c9; version=1e866f1fe528bc0158cdcd589053753032bdb52c <7ba88b5cccc1a99c1afb96e31e7eedac9907704c; version=1e866f1fe528bc0158cdcd589053753032bdb52c <de2cba068c9c648503973b57696d035cfe58a9f6; version=1e866f1fe528bc0158cdcd589053753032bdb52c <de6f8e0534cfabc528c969d453150ca90b24fb01; version=1e866f1fe528bc0158cdcd589053753032bdb52c <fc9d55377353321e78f9e108d15f72a17e8c6ee2; version=6.0

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

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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
T1499Endpoint Denial of Service

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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