ALSA: usb-audio: fix OOB write in snd_usbmidi_us122l_output()
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.
CVE-2026-90033
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90033
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "5538daf2a5cc80ac3f3e913c0db045d92d995d40",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "a441a8e52148c91c2f2a91f42e3b9bc961a13a4b",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "2dae0e3a59e31f78222279d544b98e747cd1fbff",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "1d4add2b832b56f81bb0eab065ec35c610343018",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "de6d252f115be887a701c09a05cdb076f3a590c9",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "9392a2c346762ffee8edd1ba8bac50d2e24a2ed7",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "9d81885d97cba7796d1f8edc88f2499c8296f5b9",
"versionType": "git"
},
{
"status": "affected",
"version": "030a07e441296c372f946cd4065b5d831d8dc40c",
"lessThan": "e4637ce34607f1733a34a57294966d26b263e626",
"versionType": "git"
}
],
"programFiles": [
"sound/usb/midi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.28"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.28",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"sound/usb/midi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90033
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36459 · Revision 1
- Added to Heist Feed
- Publisher date