CVE-2026-90021
Full vulnerability record from the local CVENow database.
Description
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().
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-16 11:17:15.030000
Last modified
2026-10-30 13:20:39.007000
View original CVE JSON
{
"id": "CVE-2026-90021",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-16T11:17:15.030",
"lastModified": "2026-10-30T13:20:39.007",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_midi: initialize work in f_midi_alloc()\n\nf_midi_alloc initializes free_ref to 1 and it can only be incremented\nwhen a sound card is registered via f_midi_register_card().\nf_midi_register_card() is only called in f_midi_bind() which actually\nperforms INIT_WORK. If f_midi_bind() is never run, work is not\ninitialized and the if condition in f_midi_free becomes true,\nthis results in a warning later in __flush_work as work->func = 0.\nFix this by moving INIT_WORK from f_midi_bind() to f_midi_alloc()."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/usb/gadget/function/f_midi.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "c76e82b026a28c348e5d841922aa73db36eca1d3",
"versionType": "git",
"status": "affected"
},
{
"version": "8653d71ce3763aedcf3d2331f59beda3fecd79e4",
"lessThan": "13e9f5a91360952b9b5bbc2367fc29d4a4ff2824",
"versionType": "git",
"status": "affected"
},
{
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"lessThan": "3d8b11255e632170f32f1925bfcaf96331f36317",
"versionType": "git",
"status": "affected"
},
{
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"status": "affected"
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{
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"status": "affected"
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"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",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/usb/gadget/function/f_midi.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.12",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.12",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.51",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.5",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/02ac76f27db23ef652358458c272d9d2d6f51167",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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},
{
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}