---
cve: "CVE-2026-80572"
severity: "HIGH"
cvss: 7.8
epss: "0.1%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-26 15:17:13"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T21:47:33+02:00"
---

# CVE-2026-80572

> 7.8 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

Input: byd - synchronize timer deletion before freeing private data

byd_disconnect() uses timer_delete() before freeing the driver's private
data.  This does not wait for a running byd_clear_touch() callback, which
dereferences the private data and its psmouse pointer.  A callback racing
with disconnect can therefore access the private data after it has been
freed.  The timer can also still be re-armed by byd_process_byte() while
the disconnect is in progress.

Use timer_shutdown_sync() before freeing the private data: it waits for
a running callback and turns any later re-arm attempt into a no-op.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 6.1.185
- Kernel ≥ 6.6.154
- Kernel ≥ 6.12.106
- Kernel ≥ 6.18.46
- Kernel ≥ 7.1.10

## Referenzen

- <https://git.kernel.org/stable/c/84b205297fa15f97510342221d8c9a0119711478>
- <https://git.kernel.org/stable/c/28d984a66b9e14be74986167b6ad40b5e0daf19a>
- <https://git.kernel.org/stable/c/ee944a706a18322b4a2599eebe8040a2994e928f>
- <https://git.kernel.org/stable/c/8dbfd8e32a13e116790780ed0be82b5a05eb9916>
- <https://git.kernel.org/stable/c/2e509ef60ee41a2da0deb062c262bb530143fb37>
- <https://git.kernel.org/stable/c/c83e79c0842ed29860648bcce5022ef0ba5001c6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80572) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_