CVE-2026-90033 Affecting linux-6.12 package, versions <6.12.111-1~deb12u1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-LINUX612-20506348
- published5 Oct 2026
- disclosed16 Sept 2026
Introduced: 16 Sep 2026
NewCVE-2026-90033 (opens in a new tab)How to fix?
Upgrade Debian:12 linux-6.12 to version 6.12.111-1~deb12u1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-90033
- https://git.kernel.org/stable/c/1d4add2b832b56f81bb0eab065ec35c610343018
- https://git.kernel.org/stable/c/2dae0e3a59e31f78222279d544b98e747cd1fbff
- https://git.kernel.org/stable/c/5538daf2a5cc80ac3f3e913c0db045d92d995d40
- https://git.kernel.org/stable/c/9392a2c346762ffee8edd1ba8bac50d2e24a2ed7
- https://git.kernel.org/stable/c/9d81885d97cba7796d1f8edc88f2499c8296f5b9
- https://git.kernel.org/stable/c/a441a8e52148c91c2f2a91f42e3b9bc961a13a4b
- https://git.kernel.org/stable/c/de6d252f115be887a701c09a05cdb076f3a590c9
- https://git.kernel.org/stable/c/e4637ce34607f1733a34a57294966d26b263e626