hwmon: (gpio-fan) Fix use-after-free in alarm work (CVE-2026-97582) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-97582

hwmon: (gpio-fan) Fix use-after-free in alarm work

Answer in brief

CVE-2026-97582 records a Unknown severity vulnerability in hwmon: (gpio-fan) Fix use-after-free in alarm work. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=d6fe1360f42e86262153927986dea6502daff703 <9b12bd724db9db318e3a68be17693583dc29a066 \|\| >=d6fe1360f42e86262153927986dea6502daff703 <30755d3a5782cd704c8921cac8ee66dffe4383ea \|\| >=d6fe1360f42e86262153927986dea6502daff703 <c6ab7f855891877a16d2e2ddf0cd0305fd098a85 \|\| >=d6fe1360f42e86262153927986dea6502daff703 <a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293	9b12bd724db9db318e3a68be17693583dc29a066, 30755d3a5782cd704c8921cac8ee66dffe4383ea, c6ab7f855891877a16d2e2ddf0cd0305fd098a85, a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293
Linux/Linuxgeneric	2.6.37	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 9b12bd724db9db318e3a68be17693583dc29a066 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: hwmon: (gpio-fan) Fix use-after-free in alarm work fan_alarm_irq_handler() queues fan_data->alarm_work, but nothing cancels it. fan_alarm_notify() dereferences fan_data and its hwmon device. On unbind, devres frees the interrupt, which only waits for the handler itself, and then releases the hwmon device and fan_data, so a pending fan_alarm_notify() can run after those frees. Replace INIT_WORK() with devm_work_autocancel(), registered before devm_request_irq(). The devres cleanup then frees the interrupt first, so no new work can be queued, and cancels the work while fan_data and the hwmon device are still alive. This issue was found by an in-house static analysis tool.

Quoted source text, attributed separately from HOL analysis.