Not yet scoredPublished Sep 16, 2026

CVE-2026-90033ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()

Updated under an hour ago (Oct 27, 2026, 2:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output() The snd_usbmidi_us122l_output() picks a count of 2 on anything slower than high speed and never relates it to ep->max_transfer. The URB buffer holds exactly max_transfer bytes, so a device declaring a one byte bulk endpoint takes two bytes from snd_rawmidi_transmit(), and the memset that pads the rest computes 1 - 2 in int and wraps to SIZE_MAX. Only 0x800e and 0x800f are pinned to nine bytes. The US-122MKII at 0x0644:0x8021 falls to the default and takes usb_maxpacket(), which the USB core only clamps downward. The akai and novation output ops in this file were given the same guard recently. Do the same here.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 030a07e441296c372f946cd4065b5d831d8dc40c before 5538daf2a5cc80ac3f3e913c0db045d92d995d40; from 030a07e441296c372f946cd4065b5d831d8dc40c before a441a8e52148c91c2f2a91f42e3b9bc961a13a4b; 030a07e441296c372f946cd4065b5d831d8dc40c builds before 2dae0e3a59e31f78222279d544b98e747cd1fbff; 030a07e441296c372f946cd4065b5d831d8dc40c builds before 1d4add2b832b56f81bb0eab065ec35c610343018; from 030a07e441296c372f946cd4065b5d831d8dc40c before de6d252f115be887a701c09a05cdb076f3a590c9; from 030a07e441296c372f946cd4065b5d831d8dc40c before 9392a2c346762ffee8edd1ba8bac50d2e24a2ed7; 030a07e441296c372f946cd4065b5d831d8dc40c builds before 9d81885d97cba7796d1f8edc88f2499c8296f5b9; from 030a07e441296c372f946cd4065b5d831d8dc40c before e4637ce34607f1733a34a57294966d26b263e626	CNA record

References

References

https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40
https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b
https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff
https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018
https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9
https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7
https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9
https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.