CVE-2025-37770

Service interruption via fan-speed arithmetic overflow

Published May 1, 2025 · Updated May 11, 2026

Divide-by-zero in affected Linux kernel releases beginning with 4.20 allows local users to interrupt service via an excessive Vega 10 fan speed. vega10_fan_ctrl_set_fan_speed_rpm multiplies the untrusted speed by eight in a divisor without rejecting values above UINT_MAX/8, allowing unsigned wrap to produce zero. Exploitation requires low-privileged local access and the AMD Vega 10 fan-control path; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.20%
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 releases beginning with 4.20 allows local users to interrupt service via an excessive Vega 10 fan speed. vega10_fan_ctrl_set_fan_speed_rpm multiplies the untrusted speed by eight in a divisor without rejecting values above UINT_MAX/8, allowing unsigned wrap to produce zero. Exploitation requires low-privileged local access and the AMD Vega 10 fan-control path; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-37770
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=4.20
  2. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <05de66de280ea1bd0459c994bfd2dd332cfbc2a9
  3. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <0c02fcbe4a1393a3c02da6ae35e72493cfdb2155
  4. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <4b8c3c0d17c07f301011e2908fecd2ebdcfe3d1c
  5. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <587de3ca7875c06fe3c3aa4073a85c4eff46591f
  6. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <836a189fb422e7efb81c51d5160e47ec7bc11500
  7. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <bd4d90adbca1862d03e581e10e74ab73ec75e61b
  8. Affected versionversion=c52dcf49195d06319189c7f1dd8b62bfca545197 <e109528bbf460e50074c156253d9080d223ee37f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <05de66de280ea1bd0459c994bfd2dd332cfbc2a9; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <0c02fcbe4a1393a3c02da6ae35e72493cfdb2155; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <4b8c3c0d17c07f301011e2908fecd2ebdcfe3d1c; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <587de3ca7875c06fe3c3aa4073a85c4eff46591f; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <836a189fb422e7efb81c51d5160e47ec7bc11500; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <bd4d90adbca1862d03e581e10e74ab73ec75e61b; version=c52dcf49195d06319189c7f1dd8b62bfca545197 <e109528bbf460e50074c156253d9080d223ee37f

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS: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.

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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