CVE-2026-72394

Kernel panic via zero tachometer divisor

Published Aug 15, 2026 · Updated Aug 15, 2026

Divide-by-zero in the Linux kernel's ASPEED G6 hwmon driver allows local users to trigger a kernel panic through a zero tachometer reading. The aspeed_tach_val_to_rpm function multiplies the unvalidated tachometer value into tach_div and passes zero to do_div as the divisor. Reaching the fault requires the ASPEED G6 PWM tachometer driver and a zero hardware reading from an extremely fast pulse, stuck edge, or glitch; the resulting impact is a system crash.

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 the Linux kernel's ASPEED G6 hwmon driver allows local users to trigger a kernel panic through a zero tachometer reading. The aspeed_tach_val_to_rpm function multiplies the unvalidated tachometer value into tach_div and passes zero to do_div as the divisor. Reaching the fault requires the ASPEED G6 PWM tachometer driver and a zero hardware reading from an extremely fast pulse, stuck edge, or glitch; the resulting impact is a system crash.

The record

CVE
CVE-2026-72394
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.9
  2. Affected versionversion=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <898ca04b096b9e4640300eab91468c826a1ec92b
  3. Affected versionversion=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3
  4. Affected versionversion=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1
  5. Affected versionversion=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <fe87b8dc67f1b2c64e76a66e78468c533d3c44ca

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <898ca04b096b9e4640300eab91468c826a1ec92b; version=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <a3f98bd397398e2d4a7f98e006b5aaf4d54ebdf3; version=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <fb8a5afe6f1f8aa7f19c6dda23d277dd6ae5d9e1; version=7e1449cd15d1096157d1a9923b82e37602fb7eb0 <fe87b8dc67f1b2c64e76a66e78468c533d3c44ca

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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 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.

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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