CVE-2024-50029 (GCVE-0-2024-50029)
Vulnerability from cvelistv5
Published
2024-10-21 19:39
Modified
2026-08-05 11:41
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync This checks if the ACL connection remains valid as it could be destroyed while hci_enhanced_setup_sync is pending on cmd_sync leading to the following trace: BUG: KASAN: slab-use-after-free in hci_enhanced_setup_sync+0x91b/0xa60 Read of size 1 at addr ffff888002328ffd by task kworker/u5:2/37 CPU: 0 UID: 0 PID: 37 Comm: kworker/u5:2 Not tainted 6.11.0-rc6-01300-g810be445d8d6 #7099 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ? hci_enhanced_setup_sync+0x91b/0xa60 print_report+0x152/0x4c0 ? hci_enhanced_setup_sync+0x91b/0xa60 ? __virt_addr_valid+0x1fa/0x420 ? hci_enhanced_setup_sync+0x91b/0xa60 kasan_report+0xda/0x1b0 ? hci_enhanced_setup_sync+0x91b/0xa60 hci_enhanced_setup_sync+0x91b/0xa60 ? __pfx_hci_enhanced_setup_sync+0x10/0x10 ? __pfx___mutex_lock+0x10/0x10 hci_cmd_sync_work+0x1c2/0x330 process_one_work+0x7d9/0x1360 ? __pfx_lock_acquire+0x10/0x10 ? __pfx_process_one_work+0x10/0x10 ? assign_work+0x167/0x240 worker_thread+0x5b7/0xf60 ? __kthread_parkme+0xac/0x1c0 ? __pfx_worker_thread+0x10/0x10 ? __pfx_worker_thread+0x10/0x10 kthread+0x293/0x360 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2f/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 34: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __hci_conn_add+0x187/0x17d0 hci_connect_sco+0x2e1/0xb90 sco_sock_connect+0x2a2/0xb80 __sys_connect+0x227/0x2a0 __x64_sys_connect+0x6d/0xb0 do_syscall_64+0x71/0x140 entry_SYSCALL_64_after_hwframe+0x76/0x7e Freed by task 37: kasan_save_stack+0x30/0x50 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x101/0x160 kfree+0xd0/0x250 device_release+0x9a/0x210 kobject_put+0x151/0x280 hci_conn_del+0x448/0xbf0 hci_abort_conn_sync+0x46f/0x980 hci_cmd_sync_work+0x1c2/0x330 process_one_work+0x7d9/0x1360 worker_thread+0x5b7/0xf60 kthread+0x293/0x360 ret_from_fork+0x2f/0x70 ret_from_fork_asm+0x1a/0x30
References
Impacted products
Vendor Product Version
Linux Linux Version: e07a06b4eb417f5271d33ce2240e93c62d98b7b4
Version: e07a06b4eb417f5271d33ce2240e93c62d98b7b4
Version: e07a06b4eb417f5271d33ce2240e93c62d98b7b4
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{
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            "other": {
              "content": {
                "id": "CVE-2024-50029",
                "options": [
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                "timestamp": "2024-10-22T13:26:20.682749Z",
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    "cna": {
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          "product": "Linux",
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          "product": "Linux",
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          "versions": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync\n\nThis checks if the ACL connection remains valid as it could be destroyed\nwhile hci_enhanced_setup_sync is pending on cmd_sync leading to the\nfollowing trace:\n\nBUG: KASAN: slab-use-after-free in hci_enhanced_setup_sync+0x91b/0xa60\nRead of size 1 at addr ffff888002328ffd by task kworker/u5:2/37\n\nCPU: 0 UID: 0 PID: 37 Comm: kworker/u5:2 Not tainted 6.11.0-rc6-01300-g810be445d8d6 #7099\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014\nWorkqueue: hci0 hci_cmd_sync_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x5d/0x80\n ? hci_enhanced_setup_sync+0x91b/0xa60\n print_report+0x152/0x4c0\n ? hci_enhanced_setup_sync+0x91b/0xa60\n ? __virt_addr_valid+0x1fa/0x420\n ? hci_enhanced_setup_sync+0x91b/0xa60\n kasan_report+0xda/0x1b0\n ? hci_enhanced_setup_sync+0x91b/0xa60\n hci_enhanced_setup_sync+0x91b/0xa60\n ? __pfx_hci_enhanced_setup_sync+0x10/0x10\n ? __pfx___mutex_lock+0x10/0x10\n hci_cmd_sync_work+0x1c2/0x330\n process_one_work+0x7d9/0x1360\n ? __pfx_lock_acquire+0x10/0x10\n ? __pfx_process_one_work+0x10/0x10\n ? assign_work+0x167/0x240\n worker_thread+0x5b7/0xf60\n ? __kthread_parkme+0xac/0x1c0\n ? __pfx_worker_thread+0x10/0x10\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x293/0x360\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x2f/0x70\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\n\nAllocated by task 34:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0x8f/0xa0\n __hci_conn_add+0x187/0x17d0\n hci_connect_sco+0x2e1/0xb90\n sco_sock_connect+0x2a2/0xb80\n __sys_connect+0x227/0x2a0\n __x64_sys_connect+0x6d/0xb0\n do_syscall_64+0x71/0x140\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFreed by task 37:\n kasan_save_stack+0x30/0x50\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x101/0x160\n kfree+0xd0/0x250\n device_release+0x9a/0x210\n kobject_put+0x151/0x280\n hci_conn_del+0x448/0xbf0\n hci_abort_conn_sync+0x46f/0x980\n hci_cmd_sync_work+0x1c2/0x330\n process_one_work+0x7d9/0x1360\n worker_thread+0x5b7/0xf60\n kthread+0x293/0x360\n ret_from_fork+0x2f/0x70\n ret_from_fork_asm+0x1a/0x30"
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      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable path is Bluetooth SCO/eSCO connection setup, and the race is driven by HCI events from the remote peer (eSCO parameter rejection triggering the retry queue, and ACL teardown freeing the conn), so an attacker within Bluetooth radio range of the target can reach it.\nAC:L - The attacker controls both sides of the race \u2014 repeatedly rejecting eSCO setup to queue hci_enhanced_setup_sync while forcing link abort/disconnect to free the hci_conn \u2014 and can retry indefinitely against a default-configuration controller, so the UAF is reliably reproducible.\nPR:N - No privileges are required on the target: SCO socket creation and connect carry no capability check (sco_sock_create has no capable() gate), and in the adjacent-attacker scenario the peer device needs no credentials on the victim beyond the ordinary HFP/SCO negotiation it participates in.\nUI:N - SCO/eSCO links are established automatically by the audio stack (HFP on phones, cars, headsets) or by any background application, and the queue/free race is triggered by HCI events alone with no victim action.\nS:U - The corruption is confined to kernel heap memory within the same security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The use-after-free reads freed slab memory (conn-\u003ecodec.id/data_path) whose contents an attacker can control via heap spray, and those bytes are embedded into the HCI commands emitted to the controller, providing an information-disclosure primitive over reclaimed kernel objects.\nI:H - The callback writes into the freed object (conn-\u003estate, conn-\u003eout, conn-\u003eattempt++), and since hci_conn comes from a generic kmalloc cache the freed slot can be reclaimed by attacker-sprayed structures, giving a write primitive at controlled offsets that is leverageable toward control-flow hijack.\nA:H - The use-after-free reliably corrupts kernel heap state from the hci_cmd_sync workqueue and causes oops/panic (as captured by the KASAN slab-use-after-free report), and it can be re-triggered at will to keep the system down."
            }
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      "providerMetadata": {
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/98ccd44002d88cbf4edfc4480df532a3da5a013e"
        },
        {
          "url": "https://git.kernel.org/stable/c/18fd04ad856df07733f5bb07e7f7168e7443d393"
        }
      ],
      "title": "Bluetooth: hci_conn: Fix UAF in hci_enhanced_setup_sync",
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    "cveId": "CVE-2024-50029",
    "datePublished": "2024-10-21T19:39:32.459Z",
    "dateReserved": "2024-10-21T12:17:06.067Z",
    "dateUpdated": "2026-08-05T11:41:05.446Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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hci_enhanced_setup_sync+0x91b/0xa60\\n print_report+0x152/0x4c0\\n ? hci_enhanced_setup_sync+0x91b/0xa60\\n ? __virt_addr_valid+0x1fa/0x420\\n ? hci_enhanced_setup_sync+0x91b/0xa60\\n kasan_report+0xda/0x1b0\\n ? hci_enhanced_setup_sync+0x91b/0xa60\\n hci_enhanced_setup_sync+0x91b/0xa60\\n ? __pfx_hci_enhanced_setup_sync+0x10/0x10\\n ? __pfx___mutex_lock+0x10/0x10\\n hci_cmd_sync_work+0x1c2/0x330\\n process_one_work+0x7d9/0x1360\\n ? __pfx_lock_acquire+0x10/0x10\\n ? __pfx_process_one_work+0x10/0x10\\n ? assign_work+0x167/0x240\\n worker_thread+0x5b7/0xf60\\n ? __kthread_parkme+0xac/0x1c0\\n ? __pfx_worker_thread+0x10/0x10\\n ? __pfx_worker_thread+0x10/0x10\\n kthread+0x293/0x360\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork+0x2f/0x70\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork_asm+0x1a/0x30\\n \u003c/TASK\u003e\\n\\nAllocated by task 34:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n __kasan_kmalloc+0x8f/0xa0\\n __hci_conn_add+0x187/0x17d0\\n hci_connect_sco+0x2e1/0xb90\\n sco_sock_connect+0x2a2/0xb80\\n __sys_connect+0x227/0x2a0\\n __x64_sys_connect+0x6d/0xb0\\n do_syscall_64+0x71/0x140\\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n\\nFreed by task 37:\\n kasan_save_stack+0x30/0x50\\n kasan_save_track+0x14/0x30\\n kasan_save_free_info+0x3b/0x60\\n __kasan_slab_free+0x101/0x160\\n kfree+0xd0/0x250\\n device_release+0x9a/0x210\\n kobject_put+0x151/0x280\\n hci_conn_del+0x448/0xbf0\\n hci_abort_conn_sync+0x46f/0x980\\n hci_cmd_sync_work+0x1c2/0x330\\n process_one_work+0x7d9/0x1360\\n worker_thread+0x5b7/0xf60\\n kthread+0x293/0x360\\n ret_from_fork+0x2f/0x70\\n ret_from_fork_asm+0x1a/0x30\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.57\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.4\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"6.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:44:08.296Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50029\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:44:08.296Z\", \"dateReserved\": \"2024-10-21T12:17:06.067Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T19:39:32.459Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
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}


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