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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-74302Bluetooth: hci_core: Fix UAF in hci_unregister_dev()

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 97.7% 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: hci_core: Fix UAF in hci_unregister_dev() hci_unregister_dev() does not disable cmd_timer and ncmd_timer before the hci_dev structure is freed. If a timeout fires during device teardown, the callback dereferences freed memory (including the hdev->reset function pointer), leading to a use-after-free. Add disable_delayed_work_sync() calls alongside the existing disable_work_sync() calls to ensure both timers are fully quiesced before teardown proceeds.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-74302
Debian:13linux6.12.100-1DEBIAN-CVE-2026-74302
Debian:14linux7.1.5-1DEBIAN-CVE-2026-74302
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux6.8.0-147.147UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux7.0.0-38.38UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-aws6.8.0-1067.70UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-aws7.0.0-1014.14UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-aws-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure6.8.0-1071.79UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-azure7.0.0-1017.17UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-7.07.0.0-1017.17~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1069.76UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-azure-fde7.0.0-1016.16UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-fde-7.07.0.0-1016.16~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gcp6.8.0-1071.79UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-gcp7.0.0-1014.14UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gcp-7.07.0.0-1014.14~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gke6.8.0-1066.74UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-gke7.0.0-1008.9UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1052.56UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-38.38~24.04.4UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-ibm6.8.0-1067.68UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-ibm7.0.0-1015.15UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-147.147.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidia-7.07.0.0-1024.25~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-nvidia-bos7.0.0-2022.23UBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1015.15UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oracle6.8.0-1064.67UBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-oracle7.0.0-1013.13UBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-oracle-7.07.0.0-1013.13~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-realtime7.0.0-38.38.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74302
Ubuntu:26.04:LTSlinux-riscv7.0.0-38.38.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-38.38.1~24.04.1UBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-vmware6.8.0-1008.8UBUNTU-CVE-2026-74302
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-74302
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-74302

Affected products (as reported)

VendorProductVersions
Linux Linux 96600c2e5ee8213dbab5df1617293d8e847bb4fa – before c277f624cd99e4f0e0223fd039b7615feea4afdcd6cbce18370641a21dd889e8613d8153df15eb39 – before bce2eec05bce548b548aca52c1834540f97d5d600d151a103775dd9645c78c97f77d6e2a5298d913 – before 48c7ad6afcc58c2cda11fed39791708103b6a6440d151a103775dd9645c78c97f77d6e2a5298d913 – before a0fd1086a57b982f8c24ae4ab165c2af39fe17350d151a103775dd9645c78c97f77d6e2a5298d913 – before 672d52d9412252e61b8de8d773ccdf5a277cf5400d151a103775dd9645c78c97f77d6e2a5298d913 – before 5edcc018fa6e80b2c478454a4a8229c23d67c18148542881997e17b49dc16b93fe910e0cfcf7a9f99cfc84b1d464cc024286f42a090718f9067b80ed
Linux Linux 6.10

References