CVE-2026-97582

Kernel use-after-free via uncanceled alarm work

Published Sep 25, 2026 · Updated Sep 25, 2026

Use-after-free in the Linux gpio-fan driver allows attackers to access freed kernel objects during device unbind after an alarm. The interrupt handler can queue fan_data->alarm_work without cancellation, so fan_alarm_notify dereferences fan_data and its hwmon device after devres frees both. The race requires a pending alarm work item while an administrator unbinds a GPIO fan device; the published record specifies no further impact.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux gpio-fan driver allows attackers to access freed kernel objects during device unbind after an alarm. The interrupt handler can queue fan_data->alarm_work without cancellation, so fan_alarm_notify dereferences fan_data and its hwmon device after devres frees both. The race requires a pending alarm work item while an administrator unbinds a GPIO fan device; the published record specifies no further impact.

The record

CVE
CVE-2026-97582
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.37
  2. Affected versionversion=d6fe1360f42e86262153927986dea6502daff703 <30755d3a5782cd704c8921cac8ee66dffe4383ea
  3. Affected versionversion=d6fe1360f42e86262153927986dea6502daff703 <9b12bd724db9db318e3a68be17693583dc29a066
  4. Affected versionversion=d6fe1360f42e86262153927986dea6502daff703 <a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293
  5. Affected versionversion=d6fe1360f42e86262153927986dea6502daff703 <c6ab7f855891877a16d2e2ddf0cd0305fd098a85

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.37; version=d6fe1360f42e86262153927986dea6502daff703 <30755d3a5782cd704c8921cac8ee66dffe4383ea; version=d6fe1360f42e86262153927986dea6502daff703 <9b12bd724db9db318e3a68be17693583dc29a066; version=d6fe1360f42e86262153927986dea6502daff703 <a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293; version=d6fe1360f42e86262153927986dea6502daff703 <c6ab7f855891877a16d2e2ddf0cd0305fd098a85

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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