CVE-2024-58241 (GCVE-0-2024-58241)
Vulnerability from cvelistv5
Published
2025-09-24 11:02
Modified
2026-08-05 11:47
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_core: Disable works on hci_unregister_dev This make use of disable_work_* on hci_unregister_dev since the hci_dev is about to be freed new submissions are not disarable.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0d151a103775dd9645c78c97f77d6e2a5298d913
Version: 0d151a103775dd9645c78c97f77d6e2a5298d913
Version: 48542881997e17b49dc16b93fe910e0cfcf7a9f9
Version: 9cfc84b1d464cc024286f42a090718f9067b80ed
Version: ddeda6ca5f218b668b560d90fc31ae469adbfd92
Version: d2ce562a5aff1dcd0c50d9808ea825ef90da909f
Version: 96600c2e5ee8213dbab5df1617293d8e847bb4fa
Version: d6cbce18370641a21dd889e8613d8153df15eb39
Version: 3f939bd73fed12dddc2a32a76116c19ca47c7678
Version: 4.19.319   ≤
Version: 5.4.281   ≤
Version: 5.10.223   ≤
Version: 5.15.164   ≤
Version: 6.1.101   ≤
Version: 6.6.42   ≤
Version: 6.9.11   ≤
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              "value": "AV:L - Triggering the vulnerable window requires initiating HCI device teardown (`hci_unregister_dev()`), reachable locally via `/dev/vhci` close, HCI ldisc detach, or adapter down/removal \u2014 an adjacent Bluetooth peer can influence HCI traffic but cannot cause device unregistration. All required primitives are local syscalls (open/write/close/ioctl on a device node and Bluetooth sockets).\nAC:L - The attacker controls both sides of the race \u2014 it drives the unregister (closing the vhci fd) while concurrently feeding HCI packets/commands that re-queue `rx_work`/`cmd_work`/`error_reset` \u2014 and can retry the open/close cycle indefinitely to win it and to spray the freed `hci_dev` slab. The `cmd_timer`/`ncmd_timer` re-arm even occurs on the unregister path itself via `hci_dev_close_sync()`, requiring no external timing luck.\nPR:L - No capability check exists anywhere on the path: `vhci_open()` performs no `capable()` test, so an unprivileged user granted the device node (containers, Android\u0027s bluetooth uid, permissive udev rules) can create and destroy HCI devices and inject HCI frames at will. This matches the PR:L assignment for the structurally identical `hci_unregister_dev` teardown UAF CVE-2025-38250.\nUI:N - The attacker performs both the device teardown and the concurrent work re-submission entirely from its own processes. No victim action or cooperation is needed.\nS:U - The corruption is confined to kernel slab memory and workqueue structures within the same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - A work_struct/delayed_work embedded in the freed `hci_dev` is dereferenced after `kfree()`, and `__queue_work()` follows the stale `dwork-\u003ewq` pointer into a destroyed workqueue. Controlled reallocation of the freed object turns this into an arbitrary-read primitive and leaks kernel pointers/heap contents.\nI:H - The same use-after-free lets the attacker place controlled data in the reclaimed `hci_dev` slab so that the firing timer operates on attacker-supplied `workqueue_struct`/`pool_workqueue`/list pointers and work function pointers, yielding arbitrary write and control-flow hijack. Per kernel scoring guidance, a UAF exploitable for heap spraying is High integrity impact.\nA:H - Even unexploited, the stale timer queuing onto a destroyed workqueue causes a KASAN slab-use-after-free oops and kernel panic, and `destroy_workqueue()` with still-pending work triggers a WARN and leaves the workqueue broken. Re-queued `error_reset` additionally reintroduces the `destroy_workqueue()` self-flush deadlock that hangs the req_workqueue."
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Controlled reallocation of the freed object turns this into an arbitrary-read primitive and leaks kernel pointers/heap contents.\\nI:H - The same use-after-free lets the attacker place controlled data in the reclaimed `hci_dev` slab so that the firing timer operates on attacker-supplied `workqueue_struct`/`pool_workqueue`/list pointers and work function pointers, yielding arbitrary write and control-flow hijack. Per kernel scoring guidance, a UAF exploitable for heap spraying is High integrity impact.\\nA:H - Even unexploited, the stale timer queuing onto a destroyed workqueue causes a KASAN slab-use-after-free oops and kernel panic, and `destroy_workqueue()` with still-pending work triggers a WARN and leaves the workqueue broken. 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}


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