hwmon: (gpio-fan) Fix use-after-free in alarm work (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 11 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
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.
References
- https://git.kernel.org/stable/c/7f96803f612134f585ab3b39e6d5b2d4b9c0606f
- https://git.kernel.org/stable/c/594c62eea7c82f526054496e9fa9b895122a8016
- https://git.kernel.org/stable/c/6e67d9bdac810edacef78cbaeedd34445aa8ceb7
- https://git.kernel.org/stable/c/e9fc7d53b2eb34c0a607d1659f49b46911aaf16c
- https://git.kernel.org/stable/c/9b12bd724db9db318e3a68be17693583dc29a066
- https://git.kernel.org/stable/c/30755d3a5782cd704c8921cac8ee66dffe4383ea
- https://git.kernel.org/stable/c/c6ab7f855891877a16d2e2ddf0cd0305fd098a85
- https://git.kernel.org/stable/c/a2471ed17b0e6ff7bfb6b2ea8e6e5b04c309d293
European references
- ENISA EUVD · EUVD-2026-86890
- GCVE · GCVE-0-2026-97582
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected d6fe1360f42e86262153927986dea6502daff703 < 7f96803f612134f585ab3b39e6d5b2d4b9c0606f ; affected d6fe1360f42e86262153927986dea6502daff703 < 594c62eea7c82f526054496e9fa9b895122a8016 ; affected d6fe1360f42e86262153927986dea6502daff703 < 6e67d9bdac810edacef78cbaeedd34445aa8ceb7 ; affected d6fe1360f42e86262153927986dea6502daff703 < e9fc7d53b2eb34c0a607d1659f49b46911aaf16c ; affected d6fe1360f42e86262153927986dea6502daff703 < 9b12bd724db9db318e3a68be17693583dc29a066 ; affected d6fe1360f42e86262153927986dea6502daff703 < 30755d3a5782cd704c8921cac8ee66dffe4383ea |
| Linux · Linux | affected 2.6.37 ; unaffected 0 < 2.6.37 ; unaffected 5.10.273 ≤ 5.10.* ; unaffected 5.15.222 ≤ 5.15.* ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |