---
cve: "CVE-2026-89452"
severity: "HIGH"
cvss: 8.4
epss: "0.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-11 20:19:25"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-09T05:14:33+02:00"
---

# CVE-2026-89452

> 8.4 HIGH

## Beschreibung

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

iommu/msm: Unwind probe state on registration failure

msm_iommu_probe() adds its devm-managed IOMMU object to
qcom_iommu_devices before adding the IOMMU sysfs device and registering
it with the IOMMU core.

If iommu_device_sysfs_add() fails, probe returns with the object still on
qcom_iommu_devices. The driver core then releases the devm allocation,
leaving a dangling list entry that later list walks may dereference.

If iommu_device_register() fails, the same dangling list entry remains
and the sysfs device is left registered as well.

Unwind the sysfs device and global list entry in reverse setup order on
the corresponding failure paths.

## CNA-Record (Kanon, cvelistV5)

- CNA: **Linux**
- State: PUBLISHED
- Stand: 2026-10-03 10:56:29
- CNA-CVSS: **8.4** (`CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.12.112
- Kernel ≥ 6.18.50
- Kernel ≥ 7.2.4

## BSI-Hinweise (deutsch)

- [Linux Kernel: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3321) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten oder den Systemzustand zu manipulieren, Denial-of-Service-Zustände herbeizuführen oder andere, nicht näher spezifizierte Angriffe durchzuführen.

## Referenzen

- <https://git.kernel.org/stable/c/51e37f9179387b6e3fa64a3d3b4fece1a38b3a02>
- <https://git.kernel.org/stable/c/f532401be9312ecd166f616bb74a65b0b4c150fa>
- <https://git.kernel.org/stable/c/7f7074a886c4a93e3d12076ce60a510a1ebe400c>
- <https://git.kernel.org/stable/c/535a200220ca2c83bc8bf54bd2cbe045d6ee70c4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-89452/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_