CVE-2025-68783
Description
An out-of-bounds write flaw was found in the Linux kernel's ALSA USB mixer driver for Tascam US-16x08 audio interfaces. The get_meter_levels_from_urb() function extracts channel indices from USB packets without validating the range. A malicious or malfunctioning USB device can send packets with out-of-bounds channel indices, causing writes beyond allocated arrays.
Statement
Exploitation requires physical access to connect a malicious USB device or a malfunctioning Tascam US-16x08 interface. The out-of-bounds write occurs in kernel memory and could potentially be leveraged for privilege escalation, though this would require precise control of the malicious device's output.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
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