{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49136", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T01:49:39.268Z", "datePublished": "2025-02-26T01:55:09.345Z", "dateUpdated": "2026-08-05T08:54:01.573Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:54:01.573Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set\n\nhci_cmd_sync_queue shall return an error if HCI_UNREGISTER flag has\nbeen set as that means hci_unregister_dev has been called so it will\nlikely cause a uaf after the timeout as the hdev will be freed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Although this is Bluetooth code, exploitation requires local hci_unregister_dev() (e.g. closing /dev/vhci or driver teardown) raced with a concurrent hci_cmd_sync_queue() caller; an adjacent peer can feed HCI/LE events into the queue path but cannot itself unregister the controller, matching prior hci_cmd_sync/unregister UAF scores.\nAC:L - Via /dev/vhci the attacker controls both sides—injecting HCI traffic or issuing mgmt/connect paths that call hci_cmd_sync_queue while closing the fd to run hci_unregister_dev/hci_cmd_sync_clear—and can retry open/queue/close until the post-unregister queue wins and the freed hdev is reused.\nPR:L - vhci_open() has no capable() check, so any principal with the device node (Android bluetooth uid, containers, permissive udev) can create/destroy virtual controllers and inject frames without real init-namespace root, consistent with CVE-2023-53046/CVE-2024-58241/CVE-2025-38250.\nUI:N - The attacker performs device creation, command/event injection, and teardown entirely from its own processes; no separate victim action such as mounting a filesystem or confirming a prompt is required.\nS:U - The use-after-free corrupts kernel slab/workqueue state within the host kernel’s security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Queuing after HCI_UNREGISTER leaves cmd_sync work running against a freed hci_dev after timeout/teardown; reclaiming that object yields a use-after-free read primitive over kernel heap contents, so confidentiality is High.\nI:H - The same UAF exposes sprayable hci_dev/work-entry state (including function pointers invoked from hci_cmd_sync_work), enabling arbitrary write and control-flow hijack after heap grooming.\nA:H - Use-after-free of hdev in cmd_sync/timeout paths causes kernel oops/panic even when not fully exploited, which is High availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_sync.c" ], "versions": [ { "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "1c69ef84a808676cceb69210addf5df45b741323", "status": "affected", "versionType": "git" }, { "version": "6a98e3836fa2077b169f10a35c2ca9952d53f987", "lessThan": "0b94f2651f56b9e4aa5f012b0d7eb57308c773cf", "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_sync.c" ], "versions": [ { "version": "5.17", "status": "affected" }, { "version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver" }, { "version": "5.17.3", "lessThanOrEqual": "5.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18", "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": "5.17", "versionEndExcluding": "5.17.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "5.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1c69ef84a808676cceb69210addf5df45b741323" }, { "url": "https://git.kernel.org/stable/c/0b94f2651f56b9e4aa5f012b0d7eb57308c773cf" } ], "title": "Bluetooth: hci_sync: Fix queuing commands when HCI_UNREGISTER is set", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49136", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T17:59:07.674181Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:02:29.693Z" } } ] } }