In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: bcsp: receive data only if registered
Currently, bcsp_recv() can be called even when the BCSP protocol has not been registered. This leads to a NULL pointer dereference, as shown in the following stack trace:
KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:bcsp_recv+0x13d/0x1740 drivers/bluetooth/hci_bcsp.c:590 Call Trace: <TASK> hci_uart_tty_receive+0x194/0x220 drivers/bluetooth/hci_ldisc.c:627 tiocsti+0x23c/0x2c0 drivers/tty/tty_io.c:2290 tty_ioctl+0x626/0xde0 drivers/tty/tty_io.c:2706 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f
To prevent this, ensure that the HCI_UART_REGISTERED flag is set before processing received data. If the protocol is not registered, return -EUNATCH.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | Dec 15, 2025 | Dec 15, 2025 |
| Oracle_linux | — | Upgrade kernel-uek | Jan 15, 2026 | Dec 8, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 8, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1047-oracle-64kUpgrade linux-image-oem-20.04Upgrade linux-image-aws-fipsUpgrade linux-image-oracleUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-fips-6.8Upgrade linux-image-5.15.0-173-fipsUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-6.8.0-1047-oracleUpgrade linux-image-5.15.0-1100-oracleUpgrade linux-image-6.8.0-1050-awsUpgrade linux-image-6.8.0-1050-aws-64kUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-azure-cvmUpgrade linux-image-fips-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-gcp-6.8Upgrade linux-image-fipsUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-6.8.0-1052-gcpUpgrade linux-image-5.15.0-1102-realtimeUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-lowlatency-5.15Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-awsUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-azure-6.8Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.8.0-1052-gcp-fipsUpgrade linux-image-5.15.0-1055-nvidia-tegra-rtUpgrade linux-image-5.15.0-173-generic-lpaeUpgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-5.15.0-1103-awsUpgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-lowlatency-6.8Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.17.0-1011-oemUpgrade linux-image-5.15.0-1044-nvidia-tegra-igx-rtUpgrade linux-image-gkeUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-5.15.0-1098-nvidia-lowlatencyUpgrade linux-image-5.15.0-1067-xilinx-zynqmpUpgrade linux-image-6.17.0-1007-awsUpgrade linux-image-raspi-nolpaeUpgrade linux-image-aws-64kUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-6.8.0-1050-raspiUpgrade linux-image-realtimeUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1050-aws-fipsUpgrade linux-image-aws-64k-5.15Upgrade linux-image-5.15.0-1097-raspiUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-xilinxUpgrade linux-image-5.15.0-1095-kvmUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-aws-fips-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-6.8.0-1049-nvidia-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-virtual-5.15Upgrade linux-image-gcp-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-aws-5.15Upgrade linux-image-azure-fips-5.15Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-6.8.0-106-generic-64kUpgrade linux-image-azure-fips-6.8Upgrade linux-image-virtualUpgrade linux-image-gcp-5.15Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-6.17Upgrade linux-image-raspi-realtimeUpgrade linux-image-gkeop-5.15Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-106-fipsUpgrade linux-image-gke-64kUpgrade linux-image-6.8.0-1049-nvidia-lowlatencyUpgrade linux-image-5.15.0-1098-intel-iotgUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-5.15.0-1086-gkeopUpgrade linux-image-5.15.0-1044-nvidia-tegra-igxUpgrade linux-image-nvidia-5.15Upgrade linux-image-5.15.0-1099-gkeUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-intelUpgrade linux-image-ibm-classicUpgrade linux-image-ibmUpgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-1109-azure-fipsUpgrade linux-image-5.15.0-1103-gcpUpgrade linux-image-5.15.0-1103-aws-fipsUpgrade linux-image-5.15.0-1103-aws-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-nvidia-64kUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-azure-lts-24.04Upgrade linux-image-raspi-5.15Upgrade linux-image-5.15.0-1098-nvidiaUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-azure-6.17Upgrade linux-image-6.8.0-2040-raspi-realtimeUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-5.15.0-173-lowlatency-64kUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-realtime-5.15Upgrade linux-image-oracle-5.15Upgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-lowlatencyUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-6.8.0-106-genericUpgrade linux-image-lowlatency-64kUpgrade linux-image-azure-fipsUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-kvm-5.15Upgrade linux-image-5.15.0-173-generic-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-6.8Upgrade linux-image-generic-64k-5.15Upgrade linux-image-gcp-fipsUpgrade linux-image-oem-20.04dUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-azureUpgrade linux-image-oracle-64kUpgrade linux-image-gcp-64kUpgrade linux-image-5.15.0-173-genericUpgrade linux-image-oem-20.04cUpgrade linux-image-6.8.0-1052-gcp-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-intel-iotgUpgrade linux-image-gke-64k-6.8Upgrade linux-image-gcp-64k-6.17Upgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-6.8.0-106-lowlatencyUpgrade linux-image-genericUpgrade linux-image-aws-64k-6.8Upgrade linux-image-6.8.1-1045-realtimeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-virtual-6.8Upgrade linux-image-generic-6.17Upgrade linux-image-xilinx-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1035-gkeopUpgrade linux-image-aws-64k-6.17Upgrade linux-image-6.8.0-106-lowlatency-64kUpgrade linux-image-5.15.0-1110-azureUpgrade linux-image-5.15.0-1097-ibmUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-generic-64k-6.8Upgrade linux-image-aws-lts-22.04Upgrade linux-image-nvidiaUpgrade linux-image-5.15.0-1094-intel-iot-realtimeUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-virtual-6.17Upgrade linux-image-oem-22.04bUpgrade linux-image-generic-64k-6.17Upgrade linux-image-aws-lts-24.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1048-gke-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1049-nvidiaUpgrade linux-image-6.17.0-1008-azureUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-5.15.0-173-lowlatencyUpgrade linux-image-5.15.0-1109-azureUpgrade linux-image-5.15.0-1103-gcp-fipsUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.8.0-1052-azure-fipsUpgrade linux-image-realtime-6.17Upgrade linux-image-ibm-5.15Upgrade linux-image-6.8.0-1049-ibmUpgrade linux-image-aws-6.17Upgrade linux-image-generic-64kUpgrade linux-image-gke-6.8Upgrade linux-image-gke-5.15Upgrade linux-image-6.17.0-14-genericUpgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-5.15.0-1055-nvidia-tegraUpgrade linux-image-raspi-6.17Upgrade linux-image-raspiUpgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-gkeopUpgrade linux-image-raspi-6.8Upgrade linux-image-6.8.0-1048-gkeUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1049-nvidia-lowlatency-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-ibm-6.8 | Feb 13, 2026 | Feb 12, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Dec 8, 2025 |
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