---
cve: "CVE-2026-89584"
severity: "HIGH"
cvss: 7.8
epss: "15%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-11 20:19:42"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T22:15:46+02:00"
---

# CVE-2026-89584

> 7.8 HIGH

## Beschreibung

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

block: validate user space vectors during extraction

The bio-based drivers don't necessarily check the alignment split, and
stacking block drivers don't always handle a misalignment detected after
submitting the bio. Validate user vectors against the device's
dma_alignment as the bio is built from the iov_iter, rejecting
misaligned early with -EINVAL.

## 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 ≥ 7.2.4

## Referenzen

- <https://git.kernel.org/stable/c/d44a97a3b1c00cc571245124e23e5ceb0a0225a0>
- <https://git.kernel.org/stable/c/14b007e178811db72fbb1ebb3535160db6ec1e6a>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-89584) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_