---
cve: "CVE-2026-74355"
severity: "HIGH"
cvss: 8.2
epss: "13%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 06:22:36"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T03:48:12+02:00"
---

# CVE-2026-74355

> 8.2 HIGH

## Beschreibung

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

iommu/vt-d: Fix RB-tree corruption in probe error path

The info->node RB-tree member is zero-initialized via kzalloc. If
a device does not support ATS, the device_rbtree_insert() call is
skipped. If a subsequent probe step fails, the error path jumps to
device_rbtree_remove(), which misinterprets the zeroed node as
a tree root and corrupts the device RB-tree.

Fix this by explicitly initializing the RB-node as empty using
RB_CLEAR_NODE() during initialization and guarding the removal with
RB_EMPTY_NODE().

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.18.40
- Kernel ≥ 7.1.5

## Referenzen

- <https://git.kernel.org/stable/c/f5102e0fc3c6dc8685549891a96e4589fdb3e211>
- <https://git.kernel.org/stable/c/d16923a45d4d08367650fdc3451c89299ab6ac5a>
- <https://git.kernel.org/stable/c/43bd9e6d5513cb1edbafdeef146a1edc3aaced56>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74355) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_