usb: gadget: midi2: remove default configfs groups on teardown
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: midi2: remove default configfs groups on teardown f_midi2_alloc_inst() creates default configfs child groups for the default endpoint and default block using configfs_add_default_group(), setting their internal refcount to 1. However, during function teardown in f_midi2_free_inst() or EP cleanup in f_midi2_ep_opts_release(), configfs_remove_default_groups() is never called, therefore never dropping the refcount and leaking struct f_midi2_ep_opts and f_midi2_block_opts. Add the missing configfs_remove_default_groups() in the afformentioned functions to free the structs properly.
CVE-2026-89735
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-2026-89735
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": "8b645922b22303cec4628dbbbf6c8553d1cdec87",
"lessThan": "79dbedf40ad930f83839e564394dc5d1a54938c6",
"versionType": "git"
},
{
"status": "affected",
"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87",
"lessThan": "4beda67ee72e0c8df5b49951dd8b96f6adb25e02",
"versionType": "git"
},
{
"status": "affected",
"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87",
"lessThan": "a15c2acd3083461f91725760e59dff88b33c28f6",
"versionType": "git"
},
{
"status": "affected",
"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87",
"lessThan": "9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700",
"versionType": "git"
},
{
"status": "affected",
"version": "8b645922b22303cec4628dbbbf6c8553d1cdec87",
"lessThan": "0f6bffb5008f0cba9cad5ded2caccc64466a6e54",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_midi2.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/gadget/function/f_midi2.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89735
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #35212 · Revision 1
- Added to Heist Feed
- Publisher date