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.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade python-perfUpgrade perfUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade bpftoolUpgrade kernel-livepatch-5.10.197-186.748Upgrade bpftool-debuginfoUpgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-4.14.326-245.539Upgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.133-86.144Upgrade kernel-tools-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-livepatch-6.1.55-75.123Upgrade kernel-libbpf-staticUpgrade kernel-libbpf-develUpgrade python3-perf-debuginfoUpgrade kernelUpgrade kernel-libbpfUpgrade kernel-headersUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade kernel-develUpgrade perfUpgrade python3-perf | Oct 16, 2025 | Oct 1, 2025 |
| Debian | — | Upgrade linux | Oct 3, 2025 | Oct 3, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-tools | Jan 15, 2026 | Jan 13, 2026 |
| Huawei Euleros 2_0_sp11 | — | Upgrade python3-perfUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade bpftool | Dec 12, 2025 | Dec 11, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libs | Dec 12, 2025 | Dec 11, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-realtimeUpgrade linux-raspiUpgrade linux-gkeUpgrade linux-lowlatencyUpgrade linux-oracle-5.15Upgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iotgUpgrade linux-hwe-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-fipsUpgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-aws-5.4Upgrade linuxUpgrade linux-riscv-5.15Upgrade linux-nvidia-tegraUpgrade linux-ibm-5.4Upgrade linux-ibm-5.15Upgrade linux-hwe-5.4Upgrade linux-azureUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fde-5.15Upgrade linux-kvmUpgrade linux-awsUpgrade linux-iotUpgrade linux-nvidia-tegra-igxUpgrade linux-oracleUpgrade linux-gkeopUpgrade linux-nvidiaUpgrade linux-gcpUpgrade linux-azure-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-gcp-fipsUpgrade linux-raspi-5.4Upgrade linux-gcp-5.4Upgrade linux-azure-5.4Upgrade linux-azure-5.15Upgrade linux-gcp-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-aws-fipsUpgrade linux-ibm | Oct 10, 2025 | Oct 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 1, 2025 |
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