{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-50029", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.067Z", "datePublished": "2024-10-21T19:39:32.459Z", "dateUpdated": "2026-08-05T11:41:05.446Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:41:05.446Z" }, "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 \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 \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" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "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 — repeatedly rejecting eSCO setup to queue hci_enhanced_setup_sync while forcing link abort/disconnect to free the hci_conn — 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->codec.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->state, conn->out, conn->attempt++), 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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_conn.c" ], "versions": [ { "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4", "lessThan": "867639300759e3e1c5b1e1a5ff89231f263a32a7", "status": "affected", "versionType": "git" }, { "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4", "lessThan": "98ccd44002d88cbf4edfc4480df532a3da5a013e", "status": "affected", "versionType": "git" }, { "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4", "lessThan": "18fd04ad856df07733f5bb07e7f7168e7443d393", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_conn.c" ], "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.57", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.57" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.11.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/867639300759e3e1c5b1e1a5ff89231f263a32a7" }, { "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", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-50029", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:26:20.682749Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:28:46.027Z" } } ] } }