Answer in brief
CVE-2023-53480 records a Medium severity (CVSS 5.5) vulnerability in kobject: Add sanity check for kset->kobj.ktype in kset_register(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <039ec9db2d30032eafa365f5f89b30eca5322b05 || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <964e025ceefdf75da46b0133d0c2790de451aeec || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <5df5829158513134ddcaf2184d9286eda7b0bb18 || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <48aebbe801e78a8932404c122ed0e880ccedc220 || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <1a772881bc059c596d8ca587cbd2a233edce3d3b || >=5f81880d5204ee2388fd9a75bb850ccd526885b7 <4d0fe8c52bb3029d83e323c961221156ab98680b | 039ec9db2d30032eafa365f5f89b30eca5322b05, 964e025ceefdf75da46b0133d0c2790de451aeec, 5df5829158513134ddcaf2184d9286eda7b0bb18, f3f6bf22a4f5ba649cf26ae4670de5c7f861bdef, 48aebbe801e78a8932404c122ed0e880ccedc220, 1a772881bc059c596d8ca587cbd2a233edce3d3b, 4d0fe8c52bb3029d83e323c961221156ab98680b |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Oct 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.