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).
How to fix
- Linux Linux53461710a95e15ac1f6542450943a492ecf8e550, 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053, cde47f4ccad6751ac36b7471572ddf38ee91870c, 2f21a7cbaaa93926f5be15bc095b9c57c35748d9, a8ad320efb663be30b794e3dd3e829301c0d0ed3, eaa95228b8a56c4880a182c0350d67922b22408f, 5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < 53461710a95e15ac1f6542450943a492ecf8e550, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < cde47f4ccad6751ac36b7471572ddf38ee91870c, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < 2f21a7cbaaa93926f5be15bc095b9c57c35748d9, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < a8ad320efb663be30b794e3dd3e829301c0d0ed3, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < eaa95228b8a56c4880a182c0350d67922b22408f, d2bb390a2081a36ffe906724d2848d846f2aeb29 ≤ v < 5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e, 4.11 | 53461710a95e15ac1f6542450943a492ecf8e550, 2168866396bd28ec4f3c8da0fbc7d08b5bd4f053, cde47f4ccad6751ac36b7471572ddf38ee91870c, 2f21a7cbaaa93926f5be15bc095b9c57c35748d9, a8ad320efb663be30b794e3dd3e829301c0d0ed3, eaa95228b8a56c4880a182c0350d67922b22408f, 5526c1c6ba1d0913c7dfcbbd6fe1744ea7c55f1e |
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