In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_{ldisc,serdev}: check percpu_init_rwsem() failure
syzbot is reporting NULL pointer dereference at hci_uart_tty_close() [1], for rcu_sync_enter() is called without rcu_sync_init() due to hci_uart_tty_open() ignoring percpu_init_rwsem() failure.
While we are at it, fix that hci_uart_register_device() ignores percpu_init_rwsem() failure and hci_uart_unregister_device() does not call percpu_free_rwsem().
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 |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Sep 19, 2025 | Sep 19, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel-abi-stablelists | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | Nov 14, 2025 | Sep 17, 2025 |
| Ubuntu | — | Upgrade linux-nvidiaUpgrade linux-gkeUpgrade linux-lowlatencyUpgrade linux-intel-iotgUpgrade linux-aws-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-fdeUpgrade linux-gcpUpgrade linux-riscv-5.15Upgrade linux-oracleUpgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-kvmUpgrade linux-gkeopUpgrade linuxUpgrade linux-awsUpgrade linux-intel-iotg-5.15Upgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-realtimeUpgrade linux-bluefield | Sep 26, 2025 | Sep 17, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 17, 2025 |
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