VYPR
← All advisories
Unrated severityNVD Advisory· Published Jan 13, 2026· Updated Apr 15, 2026

CVE-2025-68783

CVE-2025-68783

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).

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

82

Patches

Vulnerability mechanics

References

7

News mentions

0

No linked articles in our index yet.