ghsa-8xg4-jw8q-mm7v
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
kobject: Add sanity check for kset->kobj.ktype in kset_register()
When I register a kset in the following way: static struct kset my_kset; kobject_set_name(&my_kset.kobj, "my_kset"); ret = kset_register(&my_kset);
A null pointer dereference exception is occurred: [ 4453.568337] Unable to handle kernel NULL pointer dereference at \ virtual address 0000000000000028 ... ... [ 4453.810361] Call trace: [ 4453.813062] kobject_get_ownership+0xc/0x34 [ 4453.817493] kobject_add_internal+0x98/0x274 [ 4453.822005] kset_register+0x5c/0xb4 [ 4453.825820] my_kobj_init+0x44/0x1000 [my_kset] ... ...
Because I didn't initialize my_kset.kobj.ktype.
According to the description in Documentation/core-api/kobject.rst: - A ktype is the type of object that embeds a kobject. Every structure that embeds a kobject needs a corresponding ktype.
So add sanity check to make sure kset->kobj.ktype is not NULL.
{
"affected": [],
"aliases": [
"CVE-2023-53480"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-01T12:15:50Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkobject: Add sanity check for kset-\u003ekobj.ktype in kset_register()\n\nWhen I register a kset in the following way:\n\tstatic struct kset my_kset;\n\tkobject_set_name(\u0026my_kset.kobj, \"my_kset\");\n ret = kset_register(\u0026my_kset);\n\nA null pointer dereference exception is occurred:\n[ 4453.568337] Unable to handle kernel NULL pointer dereference at \\\nvirtual address 0000000000000028\n... ...\n[ 4453.810361] Call trace:\n[ 4453.813062] kobject_get_ownership+0xc/0x34\n[ 4453.817493] kobject_add_internal+0x98/0x274\n[ 4453.822005] kset_register+0x5c/0xb4\n[ 4453.825820] my_kobj_init+0x44/0x1000 [my_kset]\n... ...\n\nBecause I didn\u0027t initialize my_kset.kobj.ktype.\n\nAccording to the description in Documentation/core-api/kobject.rst:\n - A ktype is the type of object that embeds a kobject. Every structure\n that embeds a kobject needs a corresponding ktype.\n\nSo add sanity check to make sure kset-\u003ekobj.ktype is not NULL.",
"id": "GHSA-8xg4-jw8q-mm7v",
"modified": "2025-10-01T12:30:30Z",
"published": "2025-10-01T12:30:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53480"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/039ec9db2d30032eafa365f5f89b30eca5322b05"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1792eac72e27f676bf9ebde28a5afea627fb85f0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1a772881bc059c596d8ca587cbd2a233edce3d3b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/48aebbe801e78a8932404c122ed0e880ccedc220"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4d0fe8c52bb3029d83e323c961221156ab98680b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5df5829158513134ddcaf2184d9286eda7b0bb18"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/964e025ceefdf75da46b0133d0c2790de451aeec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef"
}
],
"schema_version": "1.4.0",
"severity": []
}
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