---
cve: "CVE-2026-64520"
severity: "HIGH"
cvss: 8.4
epss: "13%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-25 10:17:38"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:19:05+02:00"
---

# CVE-2026-64520

> 8.4 HIGH

## Beschreibung

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

firmware: arm_ffa: Bound PARTITION_INFO_GET_REGS copies

The register-based PARTITION_INFO_GET path trusted the firmware-provided
indices when copying partition descriptors into the caller buffer.
Reject inconsistent counts or index progressions so the copy loop cannot
write past the allocated array.

(fixed cur_idx when exactly one descriptor in the first fragment)

## 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 ≥ 6.18.34
- Kernel ≥ 7.0.11

## Referenzen

- <https://git.kernel.org/stable/c/f39bc7ebe75e2186b417a024a7f7e2fd4cc7eb95>
- <https://git.kernel.org/stable/c/79d95c02ae0a95e6e80e8e92b7ca74ecee02854f>
- <https://git.kernel.org/stable/c/3974ea1938406f9bfa7c1f48d4e43533f447bb08>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64520) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_