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Vulnerability · Published Dec 24, 2025 · Assigned by Linux

CVE-2023-54120Bluetooth: Fix race condition in hidp_session_thread

High 8.8

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 0.3% (higher than 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.3%top 75.7% 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 race condition in hidp_session_thread There is a potential race condition in hidp_session_thread that may lead to use-after-free. For instance, the timer is active while hidp_del_timer is called in hidp_session_thread(). After hidp_session_put, then 'session' will be freed, causing kernel panic when hidp_idle_timeout is running. The solution is to use del_timer_sync instead of del_timer. Here is the call trace: ? hidp_session_probe+0x780/0x780 call_timer_fn+0x2d/0x1e0 __run_timers.part.0+0x569/0x940 hidp_session_probe+0x780/0x780 call_timer_fn+0x1e0/0x1e0 ktime_get+0x5c/0xf0 lapic_next_deadline+0x2c/0x40 clockevents_program_event+0x205/0x320 run_timer_softirq+0xa9/0x1b0 __do_softirq+0x1b9/0x641 __irq_exit_rcu+0xdc/0x190 irq_exit_rcu+0xe/0x20 sysvec_apic_timer_interrupt+0xa1/0xc0

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-abi-stablelists4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-core4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-cross-headers4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-debug4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-debug-core4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-debug-devel4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-debug-modules4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-devel4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-doc4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-headers4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-modules4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-modules-extra4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-rt4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-core4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-debug4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-debug-core4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-devel4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-modules4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.166.1.rt7.507.el8_10ALSA-2026:70403
AlmaLinux:8kernel-tools4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-tools-libs4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-zfcpdump4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8perf4.18.0-553.166.1.el8_10ALSA-2026:70402
AlmaLinux:8python3-perf4.18.0-553.166.1.el8_10ALSA-2026:70402
Debian:12linux6.1.25-1DEBIAN-CVE-2023-54120
Debian:13linux6.1.25-1DEBIAN-CVE-2023-54120
Debian:14linux6.1.25-1DEBIAN-CVE-2023-54120
Rocky Linux:8kernel0:4.18.0-553.166.1.el8_10RLSA-2026:70402
Rocky Linux:8kernel-rt0:4.18.0-553.166.1.rt7.507.el8_10RLSA-2026:70403
Ubuntu:22.04:LTSlinux5.15.0-79.86UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-aws5.15.0-1042.47UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure5.15.0-1045.52UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1045.52.1UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gcp5.15.0-1039.47UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gke5.15.0-1039.44UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1025.30UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-ibm5.15.0-1035.38UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1037.42UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-kvm5.15.0-1039.44UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-79.88UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1030.30UBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1016.16UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1002.2UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oracle5.15.0-1040.46UBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-raspi5.15.0-1035.38UBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2023-54120
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1025.29UBUNTU-CVE-2023-54120

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 152f47bd6b995e0e98c85672f6d19894bc287ef21da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 5f3d214d19899183d4e0cce7552998262112e4ab1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 8a99e6200c38b78a45dcd12a6bdc43fdf4dc36be1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before f7ec5ca433ceead8d9d78fd2febff094f289441d1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 0efb276d5848a3accc37c6f41b85e442c47681691da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before f6719fd8f409fa1da8dc956e93822d25e1e8b3601da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 248af9feca062a4ca9c3f2ccf67056c8a5eb817f1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before c95930abd687fcd1aa040dc4fe90dff947916460
Linux Linux 2.6.12

References