GHSA-6M8V-MM29-JX9W
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
i3c: master: Fix device_register() error path
When device_register() fails in i3c_master_register_new_i3c_devs(), put_device() is called to drop the reference taken by device_register(). That drops the last reference, so the device's release callback i3c_device_release() runs and frees the i3c_device.
Two problems follow from that:
i3c_device_release() does WARN_ON(i3cdev->desc), so it warns because desc->dev->desc still points back at the descriptor. Clear it before calling put_device().
After put_device() frees the i3c_device, desc->dev is left pointing at freed memory, so clear desc->dev as well. That prevents, for example, i3c_master_unregister_i3c_devs() seeing desc->dev as non-NULL and dereferencing it.
{
"affected": [],
"aliases": [
"CVE-2026-93283"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T16:17:25Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: Fix device_register() error path\n\nWhen device_register() fails in i3c_master_register_new_i3c_devs(),\nput_device() is called to drop the reference taken by\ndevice_register(). That drops the last reference, so the device\u0027s\nrelease callback i3c_device_release() runs and frees the i3c_device.\n\nTwo problems follow from that:\n\ni3c_device_release() does WARN_ON(i3cdev-\u003edesc), so it warns because\ndesc-\u003edev-\u003edesc still points back at the descriptor. Clear it before\ncalling put_device().\n\nAfter put_device() frees the i3c_device, desc-\u003edev is left pointing at\nfreed memory, so clear desc-\u003edev as well. That prevents, for example,\ni3c_master_unregister_i3c_devs() seeing desc-\u003edev as non-NULL and\ndereferencing it.",
"id": "GHSA-6m8v-mm29-jx9w",
"modified": "2026-09-24T18:31:25Z",
"published": "2026-09-24T18:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93283"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/20a2b6df91fd782ef2ff551febef594d0b46a9a7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5bf498623f8397d45f85f14cd631c5e5a565c2fb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ecf17bf5fe8da51a6e3fc9e03a76898fcc5c6cf"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/74be657d98a8d684c0475f3cbd450ef2a30ffc73"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7ef12e1dd06e442eebf370f6e53c41bd056d0f22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7f8e2c4f3704d9774bb26b49b1ad6a60ae57d4a0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a14dbdf471001dd0601b0c491184990c178a199c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d22ad96f1a0c89e0ba66a2facc7430f0923919e3"
}
],
"schema_version": "1.4.0",
"severity": []
}
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