{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42132", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-29T15:50:41.186Z", "datePublished": "2024-07-30T07:46:27.684Z", "dateUpdated": "2026-08-05T11:35:49.667Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:49.667Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX\n\nSyzbot hit warning in hci_conn_del() caused by freeing handle that was\nnot allocated using ida allocator.\n\nThis is caused by handle bigger than HCI_CONN_HANDLE_MAX passed by\nhci_le_big_sync_established_evt(), which makes code think it's unset\nconnection.\n\nAdd same check for handle upper bound as in hci_conn_set_handle() to\nprevent warning." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "baseScore": 7.6, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable code is the Bluetooth HCI event path (`hci_le_cis_req_evt`/`hci_le_big_sync_established_evt`), driven by LE CIS requests and BIG sync establishment initiated by a remote peer in radio range. Per Bluetooth scoring convention this is Adjacent.\nAC:L - No race, no memory-layout grooming, and no timing dependency — a single HCI event carrying a connection handle above 0x0eff deterministically creates a bogus \"unset\" hci_conn whose teardown always hits the ida_free WARN.\nPR:N - LE ACL connections and broadcast/PA sync require no pairing, bonding, or authentication, and no local account is needed; the attacker only needs to be an unauthenticated peer in range of a host with LE Audio/ISO enabled.\nUI:N - The event handlers run automatically in `hci_rx_work` as part of normal LE connection and broadcast-sync processing; no victim action is required.\nS:U - The corruption is confined to the kernel's own Bluetooth connection and IDA state within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:L - The `WARN(1, ...)` in `ida_free()` emits a full register and stack backtrace containing kernel text and heap addresses, giving a bounded KASLR-defeating info leak; there is no arbitrary read primitive.\nI:L - The erroneous `ida_free()` desynchronizes `hdev->unset_handle_ida`, releasing an ID still owned by another connection so the same handle can be issued twice and `hci_conn_hash_lookup_handle()` resolves to the wrong connection; the out-of-range handle also corrupts the PB/BC flag bits of outgoing ACL/ISO headers. This is bounded kernel-state modification, not an arbitrary write.\nA:H - The bug reliably triggers a kernel WARNING, which is a panic on the many deployments (Android, CI, hardened distros) running with `panic_on_warn`, and the resulting duplicate-handle confusion persistently disrupts Bluetooth connection handling." } ] } ], "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": "f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f", "lessThan": "2ae8d7742a09c275872e670c53337b3dcedaa11c", "status": "affected", "versionType": "git" }, { "version": "84cb0143fb8a03bf941c7aaedd56c938c99dafad", "lessThan": "4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4", "status": "affected", "versionType": "git" }, { "version": "181a42edddf51d5d9697ecdf365d72ebeab5afb0", "lessThan": "d311036696fed778301d08a71a4bef737b86d8c5", "status": "affected", "versionType": "git" }, { "version": "181a42edddf51d5d9697ecdf365d72ebeab5afb0", "lessThan": "1cc18c2ab2e8c54c355ea7c0423a636e415a0c23", "status": "affected", "versionType": "git" }, { "version": "e9f708beada55426c8d678e2f46af659eb5bf4f0", "status": "affected", "versionType": "git" }, { "version": "6.6.2", "lessThan": "6.6.39", "status": "affected", "versionType": "semver" }, { "version": "6.5.12", "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_conn.c" ], "versions": [ { "version": "6.7", "status": "affected" }, { "version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.39", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.9", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "6.6.2", "versionEndExcluding": "6.6.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.9.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2ae8d7742a09c275872e670c53337b3dcedaa11c" }, { "url": "https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4" }, { "url": "https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5" }, { "url": "https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23" } ], "title": "bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:31.923Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42132", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:16:22.191923Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:36.401Z" } } ] } }