CVE-2026-74302

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux0d151a103775dd9645c78c97f77d6e2a5298d913 < 48c7ad6afcc58c2cda11fed39791708103b6a644affected
LinuxLinux0d151a103775dd9645c78c97f77d6e2a5298d913 < a0fd1086a57b982f8c24ae4ab165c2af39fe1735affected
LinuxLinux0d151a103775dd9645c78c97f77d6e2a5298d913 < 672d52d9412252e61b8de8d773ccdf5a277cf540affected
LinuxLinux0d151a103775dd9645c78c97f77d6e2a5298d913 < 5edcc018fa6e80b2c478454a4a8229c23d67c181affected
LinuxLinux48542881997e17b49dc16b93fe910e0cfcf7a9f9affected
LinuxLinux9cfc84b1d464cc024286f42a090718f9067b80edaffected
LinuxLinuxddeda6ca5f218b668b560d90fc31ae469adbfd92affected
LinuxLinuxd2ce562a5aff1dcd0c50d9808ea825ef90da909faffected
LinuxLinux96600c2e5ee8213dbab5df1617293d8e847bb4faaffected
LinuxLinuxd6cbce18370641a21dd889e8613d8153df15eb39affected
LinuxLinux3f939bd73fed12dddc2a32a76116c19ca47c7678affected
LinuxLinux4.19.319 < 4.20affected
LinuxLinux5.4.281 < 5.5affected
LinuxLinux5.10.223 < 5.11affected
LinuxLinux5.15.164 < 5.16affected
LinuxLinux6.1.101 < 6.2affected
LinuxLinux6.6.42 < 6.7affected
LinuxLinux6.9.11 < 6.10affected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References