---
cve: "CVE-2026-64106"
severity: "CRITICAL"
cvss: 9.0
epss: "15%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-19 16:17:51"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T14:01:40+02:00"
---

# CVE-2026-64106

> 9.0 CRITICAL

## Beschreibung

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

KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits

Userspace can restore an ITS Device Table Entry whose Size field encodes
more EventID bits than the virtual ITS supports.  The live MAPD path
rejects that state, but vgic_its_restore_dte() accepts it and stores the
out-of-range value in dev->num_eventid_bits.

Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before
allocating the device.  This mirrors the MAPD check and prevents the
restored state from reaching vgic_its_restore_itt(), where the unchecked
value can be converted into an oversized scan_its_table() range.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.1.175
- Kernel ≥ 6.6.142
- Kernel ≥ 6.12.92
- Kernel ≥ 6.18.34
- Kernel ≥ 7.0.11

## Referenzen

- <https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d>
- <https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a>
- <https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7>
- <https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316>
- <https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95>
- <https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64106) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_