---
cve: "CVE-2025-68783"
severity: "LOW"
cvss: 3.1
epss: "18%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-01-13 16:15:58"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T01:39:09+02:00"
---

# CVE-2025-68783

> 3.1 LOW

## Beschreibung

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

ALSA: usb-mixer: us16x08: validate meter packet indices

get_meter_levels_from_urb() parses the 64-byte meter packets sent by
the device and fills the per-channel arrays meter_level[],
comp_level[] and master_level[] in struct snd_us16x08_meter_store.

Currently the function derives the channel index directly from the
meter packet (MUB2(meter_urb, s) - 1) and uses it to index those
arrays without validating the range. If the packet contains a
negative or out-of-range channel number, the driver may write past
the end of these arrays.

Introduce a local channel variable and validate it before updating the
arrays. We reject negative indices, limit meter_level[] and
comp_level[] to SND_US16X08_MAX_CHANNELS, and guard master_level[]
updates with ARRAY_SIZE(master_level).

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.248
- Kernel ≥ 5.15.198
- Kernel ≥ 6.1.160
- Kernel ≥ 6.6.120
- Kernel ≥ 6.12.64
- Kernel ≥ 6.18.3

## Referenzen

- <https://git.kernel.org/stable/c/53461710a95e15ac1f6542450943a492ecf8e550>
- <https://git.kernel.org/stable/c/2168866396bd28ec4f3c8da0fbc7d08b5bd4f053>
- <https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c>
- <https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9>
- <https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3>
- <https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f>
- <https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-68783) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_