GHSA-C38Q-5HMW-MM46
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89735"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:20:03Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: midi2: remove default configfs groups on teardown\n\nf_midi2_alloc_inst() creates default configfs child groups for the\ndefault endpoint and default block using configfs_add_default_group(),\nsetting their internal refcount to 1.\n\nHowever, during function teardown in f_midi2_free_inst() or EP cleanup\nin f_midi2_ep_opts_release(), configfs_remove_default_groups() is\nnever called, therefore never dropping the refcount and leaking struct\nf_midi2_ep_opts and f_midi2_block_opts.\n\nAdd the missing configfs_remove_default_groups() in the afformentioned\nfunctions to free the structs properly.",
"id": "GHSA-c38q-5hmw-mm46",
"modified": "2026-09-14T15:32:35Z",
"published": "2026-09-11T21:31:38Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89735"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0f6bffb5008f0cba9cad5ded2caccc64466a6e54"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4beda67ee72e0c8df5b49951dd8b96f6adb25e02"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/79dbedf40ad930f83839e564394dc5d1a54938c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9ea5dfb2bfef4f8a7e704d1921d8a790cb7fb700"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a15c2acd3083461f91725760e59dff88b33c28f6"
}
],
"schema_version": "1.4.0",
"severity": []
}
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