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In the Linux kernel, the following vulnerability has been resolved:
firmware: dmi-sysfs: Fix null-ptr-deref in dmi_sysfs_register_handle
KASAN reported a null-ptr-deref error:
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 1373 Comm: modprobe Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) RIP: 0010:dmi_sysfs_entry_release ... Call Trace: <TASK> kobject_put dmi_sysfs_register_handle (drivers/firmware/dmi-sysfs.c:540) dmi_sysfs dmi_decode_table (drivers/firmware/dmi_scan.c:133) dmi_walk (drivers/firmware/dmi_scan.c:1115) dmi_sysfs_init (drivers/firmware/dmi-sysfs.c:149) dmi_sysfs do_one_initcall (init/main.c:1296) ... Kernel panic - not syncing: Fatal exception Kernel Offset: 0x4000000 from 0xffffffff81000000 ---[ end Kernel panic - not syncing: Fatal exception ]---
It is because previous patch added kobject_put() to release the memory which will call dmi_sysfs_entry_release() and list_del().
However, list_add_tail(entry->list) is called after the error block, so the list_head is uninitialized and cannot be deleted.
Move error handling to after list_add_tail to fix this.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.15.102-61.139Upgrade kernelUpgrade kernel-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade perfUpgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-livepatch-6.1.19-30.43Upgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-libbpf-staticUpgrade python3-perf-debuginfoUpgrade kernel-develUpgrade kernel-libbpfUpgrade kernel-libbpf-develUpgrade bpftoolUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-debuginfoUpgrade perfUpgrade kernel-debuginfo | Oct 16, 2025 | Sep 15, 2025 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel | Dec 12, 2025 | Dec 11, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade python3-perf | Jan 15, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernelUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Dec 12, 2025 | Dec 11, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-awsUpgrade linux-oracleUpgrade linux-gcp-5.15Upgrade linux-nvidiaUpgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-realtimeUpgrade linux-intel-iotg-5.15Upgrade linux-intel-iotgUpgrade linux-intel-iot-realtimeUpgrade linux-azure-fdeUpgrade linux-nvidia-tegraUpgrade linux-kvmUpgrade linux-riscv-5.15Upgrade linux-lowlatencyUpgrade linux-gkeopUpgrade linux-azure-fde-5.15Upgrade linux-gkeUpgrade linux-azureUpgrade linuxUpgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-hwe-5.15Upgrade linux-aws-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-ibmUpgrade linux-raspi | Sep 19, 2025 | Sep 16, 2025 |
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