CVE-2026-90033

CVE-2026-90033: vulnerability in Linux

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

Published

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.2%
exploitation probability
0.2%top 91% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · Linux
Related CVEs — Linux

In the same product, most dangerous first.

CVE-2024-53197HIGHALSA: usb-audio: Fix potential out-of-bound accesses for Extigy and Mbox devicesEPSS 4.1%KEVCVE-2026-31431HIGHcrypto: algif_aead - Revert to operating out-of-placeEPSS 3.4%KEVCVE-2024-53104HIGHmedia: uvcvideo: Skip parsing frames of type UVC_VS_UNDEFINED in uvc_parse_formatEPSS 3.4%KEVCVE-2025-39682CRITICALtls: fix handling of zero-length records on the rx_listEPSS 2.9%KEVCVE-2024-36971HIGHnet: fix __dst_negative_advice() raceEPSS 2.7%KEVCVE-2024-53150HIGHALSA: usb-audio: Fix out of bounds reads when finding clock sourcesEPSS 1.4%KEV
References
https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbffhttps://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4bhttps://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626