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CVE-2026-90033

Unknown

Last modified

CVE-2026-90033 is a vulnerability of currently unknown severity. 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.

Description

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 Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 030a07e441296c372f946cd4065b5d831d8dc40c, < 5538daf2a5cc80ac3f3e913c0db045d92d995d40; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < a441a8e52148c91c2f2a91f42e3b9bc961a13a4b; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < 2dae0e3a59e31f78222279d544b98e747cd1fbff; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < 1d4add2b832b56f81bb0eab065ec35c610343018; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < de6d252f115be887a701c09a05cdb076f3a590c9; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < 9392a2c346762ffee8edd1ba8bac50d2e24a2ed7; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < 9d81885d97cba7796d1f8edc88f2499c8296f5b9; >= 030a07e441296c372f946cd4065b5d831d8dc40c, < e4637ce34607f1733a34a57294966d26b263e626
LinuxLinux2.6.28

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-90033?
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.
How severe is CVE-2026-90033?
Severity scoring for CVE-2026-90033 is pending analysis.
How do I fix CVE-2026-90033?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST