{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-27416", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:47:42.682Z", "datePublished": "2024-05-17T11:51:04.270Z", "dateUpdated": "2026-08-05T11:29:45.374Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:29:45.374Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST\n\nIf we received HCI_EV_IO_CAPA_REQUEST while\nHCI_OP_READ_REMOTE_EXT_FEATURES is yet to be responded assume the remote\ndoes support SSP since otherwise this event shouldn't be generated." } ], "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 handler processes HCI events generated by a BR/EDR peer that initiates Secure Simple Pairing over an ACL link, so the attacker must be within Bluetooth radio range of the target. Per kernel scoring convention Bluetooth is Adjacent.\nAC:L - The attacker controls its own controller's LMP timing and simply starts SSP immediately upon connection-complete, which reliably beats the host's extra Read Remote Extended Features HCI command plus LMP round trip; the attempt can also be repeated without limit.\nPR:N - HCI_EV_IO_CAPA_REQUEST and HCI_EV_SIMPLE_PAIR_COMPLETE are handled during the pre-bonding pairing phase, before any credentials or link key exist, and the guard is hit before even the HCI_MGMT/HCI_BONDABLE policy checks. No privileges on the target are required.\nUI:N - Reaching the code needs only an ACL connection to a connectable or accept-listed host, which is the default steady state for embedded, automotive, audio, kiosk and previously-paired deployments. No victim action is needed to trigger the event sequence.\nS:U - The corrupted state (hci_conn reference count and connection lifetime) lives entirely within the kernel's own security authority; no VM, IOMMU or sandbox boundary is crossed.\nC:H - The unbalanced hci_conn_drop() reintroduces a reference-count underflow (CWE-911) on a kernel object, which can drive the connection to teardown while pairing-state-machine work still references it — a use-after-free class defect whose reclaimed memory can be leveraged for kernel information disclosure.\nI:H - The same refcount underflow lets an attacker-controlled peer desynchronize hci_conn lifetime accounting, and a freed-then-reused hci_conn under remote-influenced heap grooming yields write/control-flow primitives; the guidance treats use-after-free as High integrity impact.\nA:H - A remote peer can reliably stall SSP so pairing never completes, trigger WARN_ON(refcnt < 0) in hci_conn_timeout() (a panic on panic_on_warn builds such as Android and hardened distro kernels), abort a live ACL link prematurely, or leak connections that never time out and exhaust the controller's ACL slots." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_event.c" ], "versions": [ { "version": "ccb8618c972f941ebc6b2b9db491025b3369efcb", "lessThan": "afec8f772296dd8e5a2a6f83bbf99db1b9ca877f", "status": "affected", "versionType": "git" }, { "version": "1769ac55dbf3114d5bf79f11bd5dca80ee263f9c", "lessThan": "79820a7e1e057120c49be07cbe10643d0706b259", "status": "affected", "versionType": "git" }, { "version": "40a33a129d99639921ce00d274cca44ba282f1ac", "lessThan": "df193568d61234c81de7ed4d540c01975de60277", "status": "affected", "versionType": "git" }, { "version": "1ef071526848cc3109ade63268854cd7c20ece0c", "lessThan": "c3df637266df29edee85e94cab5fd7041e5753ba", "status": "affected", "versionType": "git" }, { "version": "25e5d2883002e235f3378b8592aad14aeeef898c", "lessThan": "30a5e812f78e3d1cced90e1ed750bf027599205f", "status": "affected", "versionType": "git" }, { "version": "c7f59461f5a78994613afc112cdd73688aef9076", "lessThan": "fba268ac36ab19f9763ff90d276cde0ce6cd5f31", "status": "affected", "versionType": "git" }, { "version": "c7f59461f5a78994613afc112cdd73688aef9076", "lessThan": "8e2758cc25891d2b76717aaf89b40ed215de188c", "status": "affected", "versionType": "git" }, { "version": "c7f59461f5a78994613afc112cdd73688aef9076", "lessThan": "7e74aa53a68bf60f6019bd5d9a9a1406ec4d4865", "status": "affected", "versionType": "git" }, { "version": "2c7f9fda663a1b31a61744ffc456bdb89c4efc7f", "status": "affected", "versionType": "git" }, { "version": "746dbb0fc6392eca23de27f8aa9d13979b564889", "status": "affected", "versionType": "git" }, { "version": "4.19.297", "lessThan": "4.19.309", "status": "affected", "versionType": "semver" }, { "version": "5.4.259", "lessThan": "5.4.271", "status": "affected", "versionType": "semver" }, { "version": "5.10.199", "lessThan": "5.10.212", "status": "affected", "versionType": "semver" }, { "version": "5.15.137", "lessThan": "5.15.151", "status": "affected", "versionType": "semver" }, { "version": "6.1.60", "lessThan": "6.1.81", "status": "affected", "versionType": "semver" }, { "version": "4.14.328", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "6.5.9", "lessThan": "6.6", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hci_event.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.309", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.271", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.212", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.151", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.81", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.21", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.9", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "4.19.297", "versionEndExcluding": "4.19.309" }, { "vulnerable": true, "criteria": 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"title": "Bluetooth: hci_event: Fix handling of HCI_EV_IO_CAPA_REQUEST", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-12T15:20:36.979047Z", "id": "CVE-2024-27416", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-12T15:20:51.306Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:34:52.342Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/afec8f772296dd8e5a2a6f83bbf99db1b9ca877f", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/79820a7e1e057120c49be07cbe10643d0706b259", "tags": [ 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