---
cve: "CVE-2026-74309"
severity: "CRITICAL"
cvss: 10.0
epss: "45%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-15 06:22:30"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-08-31T20:43:51+02:00"
---

# CVE-2026-74309

> 10.0 CRITICAL

## Beschreibung

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

vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler

Look up the IRQ index in oct_hw->irqs instead of assuming
irq - irqs[0]. This supports non-contiguous IRQ numbers and
avoids incorrect ring indexing when irqs[0] is not the base.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| 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/3ef0cfa77a3d526591be069850d186c255e3f0cc>
- <https://git.kernel.org/stable/c/c6c7eae5de798442987619434171ac886035d57c>
- <https://git.kernel.org/stable/c/0d21a1d6375a05274291e32c1ab7cd57dbb69513>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-74309) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_