CVE-2024-42132

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Per Bluetooth scoring convention this is Adjacent.\nAC:L - No race, no memory-layout grooming, and no timing dependency \u2014 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"}}]}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/hci_conn.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2ae8d7742a09c275872e670c53337b3dcedaa11c", "status": "affected", "version": "f7e83f2278f06b577e3c92ea2f4e8e8c6fc72a8f", "versionType": "git"}, {"lessThan": "4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4", "status": "affected", "version": "84cb0143fb8a03bf941c7aaedd56c938c99dafad", "versionType": "git"}, {"lessThan": "d311036696fed778301d08a71a4bef737b86d8c5", "status": "affected", "version": "181a42edddf51d5d9697ecdf365d72ebeab5afb0", "versionType": "git"}, {"lessThan": "1cc18c2ab2e8c54c355ea7c0423a636e415a0c23", "status": "affected", "version": "181a42edddf51d5d9697ecdf365d72ebeab5afb0", "versionType": "git"}, {"status": "affected", "version": "e9f708beada55426c8d678e2f46af659eb5bf4f0", "versionType": "git"}, {"lessThan": "6.6.39", "status": "affected", "version": "6.6.2", "versionType": "semver"}, {"lessThan": "6.6", "status": "affected", "version": "6.5.12", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/hci_conn.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.39", "versionType": "semver"}, {"lessThanOrEqual": "6.9.*", "status": "unaffected", "version": "6.9.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AFD63F94-BD00-4EF2-9873-45E8DED18B9A", "versionEndExcluding": "6.6", "versionStartIncluding": "6.5.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B5144E7D-E246-428E-8430-273409C780F9", "versionEndExcluding": "6.6.39", "versionStartIncluding": "6.6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ADCC1407-0CB3-4C8F-B4C5-07F682CD7085", "versionEndExcluding": "6.9.9", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*", "matchCriteriaId": "2EBB4392-5FA6-4DA9-9772-8F9C750109FA", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*", "matchCriteriaId": "331C2F14-12C7-45D5-893D-8C52EE38EA10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*", "matchCriteriaId": "3173713D-909A-4DD3-9DD4-1E171EB057EE", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc4:*:*:*:*:*:*", "matchCriteriaId": "79F18AFA-40F7-43F0-BA30-7BDB65F918B9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc5:*:*:*:*:*:*", "matchCriteriaId": "BD973AA4-A789-49BD-8D57-B2846935D3C7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.10:rc6:*:*:*:*:*:*", "matchCriteriaId": "8F3E9E0C-AC3E-4967-AF80-6483E8AB0078", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}, {"lang": "es", "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bluetooth/hci: no permitir configuraci\u00f3n de identificador mayor que HCI_CONN_HANDLE_MAX Advertencia de activaci\u00f3n de Syzbot en hci_conn_del() causada por la liberaci\u00f3n del identificador que no se asign\u00f3 mediante el asignador de ida. Esto se debe a un identificador mayor que HCI_CONN_HANDLE_MAX pasado por hci_le_big_sync_establecido_evt(), lo que hace que el c\u00f3digo piense que es una conexi\u00f3n no configurada. Agregue la misma verificaci\u00f3n para el l\u00edmite superior del controlador que en hci_conn_set_handle() para evitar advertencias."}], "id": "CVE-2024-42132", "lastModified": "2026-08-04T11:19:37.430", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.6, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.7, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-42132", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:16:22.191923Z", "version": "2.0.3"}}]}, "published": "2024-07-30T08:15:05.213", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ae8d7742a09c275872e670c53337b3dcedaa11c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1cc18c2ab2e8c54c355ea7c0423a636e415a0c23"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4970e48f83dbd21d2a6a7cdaaafc2a71f7f45dc4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d311036696fed778301d08a71a4bef737b86d8c5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-763"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: bluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX", "id": "2301497", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2301497"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbluetooth/hci: disallow setting handle bigger than HCI_CONN_HANDLE_MAX\nSyzbot hit warning in hci_conn_del() caused by freeing handle that was\nnot allocated using ida allocator.\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.\nAdd same check for handle upper bound as in hci_conn_set_handle() to\nprevent warning."], "name": "CVE-2024-42132", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42132\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42132\nhttps://lore.kernel.org/linux-cve-announce/2024073028-CVE-2024-42132-49bf@gregkh/T"], "statement": "Red Hat Enterprise Linux 8 is not affected by this vulnerability.", "threat_severity": "Low"}

{}