usb: gadget: f_midi: initialize work in f_midi_alloc()
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_midi: initialize work in f_midi_alloc() f_midi_alloc initializes free_ref to 1 and it can only be incremented when a sound card is registered via f_midi_register_card(). f_midi_register_card() is only called in f_midi_bind() which actually performs INIT_WORK. If f_midi_bind() is never run, work is not initialized and the if condition in f_midi_free becomes true, this results in a warning later in __flush_work as work->func = 0. Fix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc().
CVE-2026-90021
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-2026-90021
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": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "13e9f5a91360952b9b5bbc2367fc29d4a4ff2824",
"versionType": "git"
},
{
"status": "affected",
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "3d8b11255e632170f32f1925bfcaf96331f36317",
"versionType": "git"
},
{
"status": "affected",
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "02ac76f27db23ef652358458c272d9d2d6f51167",
"versionType": "git"
},
{
"status": "affected",
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "858576de6b2f5166b08dae803f0fd0766dcb3002",
"versionType": "git"
},
{
"status": "affected",
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "7e07d3e4c389217d7d7171d80edf2e23ac70f1ea",
"versionType": "git"
},
{
"status": "affected",
"version": "89019ab7a64fcdf98a2ba7799e5c6aff58d4a05d",
"versionType": "git"
},
{
"status": "affected",
"version": "3635523e9b96213969693c320302d536774d8e9b",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.291",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.235",
"lessThan": "5.11",
"versionType": "semver"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_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": "5.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"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": [
"drivers/usb/gadget/function/f_midi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90021
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48581 · Revision 1
- Added to Heist Feed
- Publisher date