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Vulnerability · Published Oct 1, 2025 · Assigned by Linux

CVE-2023-53520Bluetooth: Fix hci_suspend_sync crash

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix hci_suspend_sync crash If hci_unregister_dev() frees the hci_dev object but hci_suspend_notifier may still be accessing it, it can cause the program to crash. Here's the call trace: <4>[102152.653246] Call Trace: <4>[102152.653254] hci_suspend_sync+0x109/0x301 [bluetooth] <4>[102152.653259] hci_suspend_dev+0x78/0xcd [bluetooth] <4>[102152.653263] hci_suspend_notifier+0x42/0x7a [bluetooth] <4>[102152.653268] notifier_call_chain+0x43/0x6b <4>[102152.653271] __blocking_notifier_call_chain+0x48/0x69 <4>[102152.653273] __pm_notifier_call_chain+0x22/0x39 <4>[102152.653276] pm_suspend+0x287/0x57c <4>[102152.653278] state_store+0xae/0xe5 <4>[102152.653281] kernfs_fop_write+0x109/0x173 <4>[102152.653284] __vfs_write+0x16f/0x1a2 <4>[102152.653287] ? selinux_file_permission+0xca/0x16f <4>[102152.653289] ? security_file_permission+0x36/0x109 <4>[102152.653291] vfs_write+0x114/0x21d <4>[102152.653293] __x64_sys_write+0x7b/0xdb <4>[102152.653296] do_syscall_64+0x59/0x194 <4>[102152.653299] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 This patch holds the reference count of the hci_dev object while processing it in hci_suspend_notifier to avoid potential crash caused by the race condition.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.55-1DEBIAN-CVE-2023-53520
Debian:13linux6.5.6-1DEBIAN-CVE-2023-53520
Debian:14linux6.5.6-1DEBIAN-CVE-2023-53520
Ubuntu:22.04:LTSlinux5.15.0-176.186USN-8180-1
Ubuntu:22.04:LTSlinux5.15.0-176.186UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-aws5.15.0-1105.112UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-aws5.15.0-1105.112USN-8180-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure5.15.0-1110.119USN-8180-3
Ubuntu:22.04:LTSlinux-azure5.15.0-1110.119UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1114.123UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gcp5.15.0-1105.114USN-8180-1
Ubuntu:22.04:LTSlinux-gcp5.15.0-1105.114UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gke5.15.0-1101.107UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-gke5.15.0-1101.107USN-8180-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1088.96USN-8180-1
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1088.96UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-ibm5.15.0-1099.102UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-ibm5.15.0-1099.102USN-8180-5
Ubuntu:24.04:LTSlinux-intelno fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1100.106UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1100.106USN-8180-3
Ubuntu:22.04:LTSlinux-kvm5.15.0-1097.102USN-8180-3
Ubuntu:22.04:LTSlinux-kvm5.15.0-1097.102UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-175.185USN-8180-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-175.185UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1100.101USN-8180-1
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1100.101UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1057.57UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1057.57USN-8187-1
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1046.46UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1046.46USN-8187-1
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-oracle5.15.0-1102.108USN-8180-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1102.108UBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-raspi5.15.0-1099.102USN-8180-6
Ubuntu:22.04:LTSlinux-raspi5.15.0-1099.102UBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53520
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-53520
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1070.74USN-8275-1
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1070.74UBUNTU-CVE-2023-53520

Affected products (as reported)

VendorProductVersions
Linux Linux 9952d90ea2885d7cbf80cd233f694f09a9c0eaec – before e1fa25a91091bbed691ba2996a6cee809e3309a29952d90ea2885d7cbf80cd233f694f09a9c0eaec – before 06e2b5ad72b60f90bfe565c201346532e271f4849952d90ea2885d7cbf80cd233f694f09a9c0eaec – before f9c8ce5d665653e3cf71a76349d41d7a7f7947e69952d90ea2885d7cbf80cd233f694f09a9c0eaec – before 573ebae162111063eedc6c838a659ba628f66a0f
Linux Linux 5.7

References