{"id":"DEBIAN-CVE-2023-53480","details":"In the Linux kernel, the following vulnerability has been resolved:  kobject: Add sanity check for kset-\u003ekobj.ktype in kset_register()  When I register a kset in the following way: \tstatic struct kset my_kset; \tkobject_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-\u003ekobj.ktype is not NULL.","modified":"2026-09-15T09:02:51.431349423Z","published":"2025-10-01T12:15:50.600Z","upstream":["CVE-2023-53480"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53480"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.55-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53480.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53480.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.5.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53480.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}