---
cve: "CVE-2026-64490"
severity: "HIGH"
cvss: 8.4
epss: "15%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-25 10:17:34"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T18:59:07+02:00"
---

# CVE-2026-64490

> 8.4 HIGH

## Beschreibung

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

ALSA: virtio: Validate control metadata from the device

virtio-snd control handling trusts the device-provided control type and
value count returned by the device.

That metadata is then used directly to index g_v2a_type_map[] in
virtsnd_kctl_info(), and to size loops and memcpy() operations in
virtsnd_kctl_get() and virtsnd_kctl_put() against fixed-size
virtio_snd_ctl_value and snd_ctl_elem_value arrays.

A buggy or malicious device can therefore trigger out-of-bounds access by
advertising an invalid control type or an oversized value count.

Validate control type and count once in virtsnd_kctl_parse_cfg(), before
querying enumerated items or exposing the control to ALSA.

## 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 ≥ 6.12.96
- Kernel ≥ 6.18.39
- Kernel ≥ 7.1.4

## Referenzen

- <https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1>
- <https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9>
- <https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a>
- <https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64490) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_