CVE-2026-43119

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The plain\nC accesses constitute a data race.\n\nAdd READ_ONCE()/WRITE_ONCE() annotations on all concurrent accesses\nto hdev->req_status to prevent potential compiler optimizations that\ncould affect correctness (e.g., load fusing in the wait_event\ncondition or store reordering)."}], "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", "net/bluetooth/hci_core.c", "net/bluetooth/hci_sync.c"], "versions": [{"version": "f80c5dad7b6467b884c445ffea45985793b4b2d0", "lessThan": "ff5855e8891e1e2490741366d087fd2fbcaabc4a", "status": "affected", "versionType": "git"}, {"version": "f80c5dad7b6467b884c445ffea45985793b4b2d0", "lessThan": "e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4", "status": "affected", "versionType": "git"}, {"version": "f80c5dad7b6467b884c445ffea45985793b4b2d0", "lessThan": "6e539907c0d11f514c5e0b049b27b04dff48a5b1", "status": 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around hdev->req_status", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43119", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:28:43.636559Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T15:32:31.799Z"}}]}}

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The plain\nC accesses constitute a data race.\n\nAdd READ_ONCE()/WRITE_ONCE() annotations on all concurrent accesses\nto hdev->req_status to prevent potential compiler optimizations that\ncould affect correctness (e.g., load fusing in the wait_event\ncondition or store reordering)."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.83", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.24", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.14", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.19.47"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.0.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.1.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:25:00.556Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43119", "state": "PUBLISHED", "dateUpdated": "2026-11-06T15:32:31.799Z", "dateReserved": "2026-05-01T14:12:55.987Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-06T07:40:43.257Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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hci_send_cmd_sync() reads req_status in hci_cmd_work (workqueue)\n - hci_cmd_sync_complete() reads/writes from HCI event completion\n - hci_cmd_sync_cancel() / hci_cmd_sync_cancel_sync() read/write\n - hci_abort_conn() reads in connection abort path\n\nSince __hci_cmd_sync_sk() runs on hdev->req_workqueue while\nhci_send_cmd_sync() runs on hdev->workqueue, these are different\nworkqueues that can execute concurrently on different CPUs. The plain\nC accesses constitute a data race.\n\nAdd READ_ONCE()/WRITE_ONCE() annotations on all concurrent accesses\nto hdev->req_status to prevent potential compiler optimizations that\ncould affect correctness (e.g., load fusing in the wait_event\ncondition or store reordering)."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nBluetooth: hci_sync: anotar condiciones de carrera de datos alrededor de hdev -> req_status\n\n__hci_cmd_sync_sk() establece hdev -> req_status bajo hdev -> req_lock:\n\n hdev -> req_status = HCI_REQ_PEND;\n\nSin embargo, varias otras funciones leen o escriben hdev -> req_status sin mantener ning\u00fan bloqueo:\n\n - hci_send_cmd_sync() lee req_status en hci_cmd_work (workqueue)\n - hci_cmd_sync_complete() lee/escribe desde la finalizaci\u00f3n del evento HCI\n - hci_cmd_sync_cancel() / hci_cmd_sync_cancel_sync() leen/escriben\n - hci_abort_conn() lee en la ruta de aborto de conexi\u00f3n\n\nDado que __hci_cmd_sync_sk() se ejecuta en hdev -> req_workqueue mientras que hci_send_cmd_sync() se ejecuta en hdev -> workqueue, estas son diferentes workqueues que pueden ejecutarse concurrentemente en diferentes CPUs. Los accesos C simples constituyen una condici\u00f3n de carrera de datos.\n\nA\u00f1adir anotaciones READ_ONCE()/WRITE_ONCE() en todos los accesos concurrentes a hdev -> req_status para prevenir posibles optimizaciones del compilador que podr\u00edan afectar la correcci\u00f3n (p. ej., fusi\u00f3n de cargas en la condici\u00f3n wait_event o reordenamiento de almacenamiento)."}], "id": "CVE-2026-43119", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43119", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:28:43.636559Z", "version": "2.0.3"}}]}, "published": "2026-05-06T10:16:25.773", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/40734ce8efc34c4a0d0222855798c0dc14b65f2e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6e539907c0d11f514c5e0b049b27b04dff48a5b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6807cfc195ef99e1ac37b2e1e60df40295daa8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e51042ddc0b20d9bda5eb6dcf85a2668f9c5dae4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ff5855e8891e1e2490741366d087fd2fbcaabc4a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: Bluetooth: hci_sync: annotate data-races around hdev->req_status", "id": "2466991", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466991"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2026-43119", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43119\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43119\nhttps://lore.kernel.org/linux-cve-announce/2026050627-CVE-2026-43119-d24f@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6e539907c0d11f514c5e0b049b27b04dff48a5b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a7a1cdb4a64ca74eb95cc46648fccb8cd3f9af27)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,40734ce8efc34c4a0d0222855798c0dc14b65f2e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b6807cfc195ef99e1ac37b2e1e60df40295daa8c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.83,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.24,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.14,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T11:45:03.024586+00:00", "updated": "2026-05-12T23:15:27.440978+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-362"]}