In the Linux kernel, the following vulnerability has been resolved:
hwmon: (coretemp) Check for null before removing sysfs attrs
If coretemp_add_core() gets an error then pdata->core_data[indx] is already NULL and has been kfreed. Don't pass that to sysfs_remove_group() as that will crash in sysfs_remove_group().
[Shortened for readability] [91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label' <cpu offline> [91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188 [91855.165103] #PF: supervisor read access in kernel mode [91855.194506] #PF: error_code(0x0000) - not-present page [91855.224445] PGD 0 P4D 0 [91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI ... [91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80 ... [91855.796571] Call Trace: [91855.810524] coretemp_cpu_offline+0x12b/0x1dd [coretemp] [91855.841738] ? coretemp_cpu_online+0x180/0x180 [coretemp] [91855.871107] cpuhp_invoke_callback+0x105/0x4b0 [91855.893432] cpuhp_thread_fun+0x8e/0x150 ...
Fix this by checking for NULL first.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Oct 23, 2024 | Oct 23, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Oct 21, 2024 |
| Ubuntu | — | Upgrade linux-hweUpgrade linux-ibmUpgrade linux-nvidia-tegra-5.15Upgrade linux-azure-5.15Upgrade linux-intel-iot-realtimeUpgrade linuxUpgrade linux-gcp-5.4Upgrade linux-gcp-4.15Upgrade linux-ibm-5.4Upgrade linux-hwe-5.4Upgrade linux-gkeopUpgrade linux-aws-hweUpgrade linux-lowlatencyUpgrade linux-gcp-fipsUpgrade linux-azure-fipsUpgrade linux-oracle-5.15Upgrade linux-aws-fipsUpgrade linux-gkeUpgrade linux-hwe-5.15Upgrade linux-raspi-5.4Upgrade linux-oracle-5.4Upgrade linux-nvidiaUpgrade linux-gkeop-5.15Upgrade linux-azureUpgrade linux-bluefieldUpgrade linux-iotUpgrade linux-gcpUpgrade linux-xilinx-zynqmpUpgrade linux-fipsUpgrade linux-intel-iotgUpgrade linux-raspiUpgrade linux-intel-iotg-5.15Upgrade linux-aws-5.4Upgrade linux-awsUpgrade linux-kvmUpgrade linux-oracleUpgrade linux-azure-4.15Upgrade linux-aws-5.15Upgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-realtimeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-fdeUpgrade linux-azure-5.4 | Nov 19, 2024 | Oct 21, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Oct 21, 2024 |
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