Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 039ec9db2d30032eafa365f5f89b30eca5322b05; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 964e025ceefdf75da46b0133d0c2790de451aeec; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 5df5829158513134ddcaf2184d9286eda7b0bb18; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 48aebbe801e78a8932404c122ed0e880ccedc220; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 1a772881bc059c596d8ca587cbd2a233edce3d3b; affected 5f81880d5204ee2388fd9a75bb850ccd526885b7 before 4d0fe8c52bb3029d83e323c961221156ab98680b |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 4.19.295 through 4.19.*; unaffected 5.4.257 through 5.4.*; unaffected 5.10.197 through 5.10.*; unaffected 5.15.133 through 5.15.*; unaffected 6.1.55 through 6.1.*; unaffected 6.5.5 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/039ec9db2d30032eafa365f5f89b30eca5322b05
- https://git.kernel.org/stable/c/964e025ceefdf75da46b0133d0c2790de451aeec
- https://git.kernel.org/stable/c/5df5829158513134ddcaf2184d9286eda7b0bb18
- https://git.kernel.org/stable/c/f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef
- https://git.kernel.org/stable/c/48aebbe801e78a8932404c122ed0e880ccedc220
- https://git.kernel.org/stable/c/1a772881bc059c596d8ca587cbd2a233edce3d3b
- https://git.kernel.org/stable/c/4d0fe8c52bb3029d83e323c961221156ab98680b