CVE-2023-53480 (GCVE-0-2023-53480)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2026-01-05 10:20
VLAI?
Title
kobject: Add sanity check for kset->kobj.ktype in kset_register()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 039ec9db2d30032eafa365f5f89b30eca5322b05 (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 964e025ceefdf75da46b0133d0c2790de451aeec (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 5df5829158513134ddcaf2184d9286eda7b0bb18 (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 48aebbe801e78a8932404c122ed0e880ccedc220 (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 1a772881bc059c596d8ca587cbd2a233edce3d3b (git)
Affected: 5f81880d5204ee2388fd9a75bb850ccd526885b7 , < 4d0fe8c52bb3029d83e323c961221156ab98680b (git)
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    Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 4.19.295 , ≤ 4.19.* (semver)
Unaffected: 5.4.257 , ≤ 5.4.* (semver)
Unaffected: 5.10.197 , ≤ 5.10.* (semver)
Unaffected: 5.15.133 , ≤ 5.15.* (semver)
Unaffected: 6.1.55 , ≤ 6.1.* (semver)
Unaffected: 6.5.5 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
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        "dateUpdated": "2026-01-05T10:20:53.251Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53480",
    "datePublished": "2025-10-01T11:42:48.919Z",
    "dateReserved": "2025-10-01T11:39:39.402Z",
    "dateUpdated": "2026-01-05T10:20:53.251Z",
    "state": "PUBLISHED"
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}


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