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CVE-2025-68783
ALSA: usb-mixer: us16x08: validate meter packet indices
Description

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).

INFO

Published Date :

Jan. 13, 2026, 4:15 p.m.

Last Modified :

Jan. 13, 2026, 4:15 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-68783 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Validate packet indices to prevent out-of-bounds writes to arrays.
  • Validate channel index from meter packet.
  • Reject negative indices.
  • Limit indices to SND_US16X08_MAX_CHANNELS.
  • Guard master_level updates with ARRAY_SIZE.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-68783.

URL Resource
https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9
https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e
https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3
https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c
https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-68783 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-68783 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-68783 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-68783 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jan. 13, 2026

    Action Type Old Value New Value
    Added Description 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).
    Added Reference https://git.kernel.org/stable/c/2f21a7cbaaa93926f5be15bc095b9c57c35748d9
    Added Reference https://git.kernel.org/stable/c/5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e
    Added Reference https://git.kernel.org/stable/c/a8ad320efb663be30b794e3dd3e829301c0d0ed3
    Added Reference https://git.kernel.org/stable/c/cde47f4ccad6751ac36b7471572ddf38ee91870c
    Added Reference https://git.kernel.org/stable/c/eaa95228b8a56c4880a182c0350d67922b22408f
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
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