---
cve: "CVE-2026-93054"
severity: "HIGH"
cvss: 7.0
epss: "0.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-17 17:17:58"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T14:43:35+02:00"
---

# CVE-2026-93054

> 7.0 HIGH

## Beschreibung

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

uio: Fix stale info pointer in failed registration path

After device_add(), the UIO device is visible to userspace and /dev/uioX
can be opened. If a later setup step fails, __uio_register_device()
unwinds the device but leaves idev->info pointing at the caller-owned
struct uio_info.

That is unsafe when an opener races with the failed registration path.
The open file keeps a reference to the uio_device, while the caller sees
registration failure and may free its struct uio_info. Later file
operations can then follow idev->info and dereference freed memory.

Handle post-device_add() failures like unregister: remove UIO attributes
while the info pointer is still valid, then clear idev->info under
info_lock and wake existing waiters/async users before removing the
device and minor. This makes already-open file descriptors observe the
same "device gone" state as normal uio_unregister_device().

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| 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 ≥ 5.10.270
- Kernel ≥ 5.15.221
- Kernel ≥ 6.1.188
- Kernel ≥ 6.6.157
- Kernel ≥ 6.12.110
- Kernel ≥ 6.18.52
- Kernel ≥ 7.2.6

## Referenzen

- <https://git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567>
- <https://git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243>
- <https://git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb>
- <https://git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151>
- <https://git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac>
- <https://git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c>
- <https://git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20>
- <https://git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-93054) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_