{"api_version":"1","generated_at":"2026-08-02T17:40:03+00:00","cve":"CVE-2026-64405","urls":{"html":"https://cve.report/CVE-2026-64405","api":"https://cve.report/api/cve/CVE-2026-64405.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64405","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64405"},"summary":{"title":"Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()\n\nhci_abort_conn() read hci_skb_event(hdev->sent_cmd) when a connection\nwas pending, but hdev->sent_cmd can be NULL while req_status is still\nHCI_REQ_PEND, leading to a NULL pointer dereference and a general\nprotection fault from the hci_rx_work() receive path.\n\nInstead of inspecting hdev->sent_cmd, track the in-flight create\nconnection command with a new per-connection HCI_CONN_CREATE flag and\nroute all cancellation through hci_cancel_connect_sync(), which\ndispatches to a dedicated per-type cancel function. The create command\nis in exactly one of two states: still queued, or in flight. The cancel\nfunction holds cmd_sync_work_lock across the whole decision: the worker\ntakes this lock to dequeue every entry, so while it is held a queued\ncommand cannot start running and an in-flight command cannot complete\nand let the next command become pending. This keeps the flag test and\nhci_cmd_sync_cancel() atomic with respect to the worker, so a queued\ncommand is simply dequeued, and an in-flight command owned by this\nconnection is cancelled without the risk of cancelling an unrelated\ncommand that became pending in the meantime. CIS uses the same flag\nmechanism via HCI_CONN_CREATE_CIS but cannot be dequeued per-connection.\n\nhci_acl_create_conn_sync() and hci_le_create_conn_sync() clear\nHCI_CONN_CREATE after the create command completes, but the command\nstatus handler can free conn via hci_conn_del() (for example when the\ncontroller rejects the connection) while the worker is still blocked on\nthe connection complete event. Hold a reference on conn across the\ncreate command so the flag can be cleared without a use-after-free.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:24","updated_at":"2026-07-25 10:17:24"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/903227b6168bb99fd57d4e3c9c1b5014986198e0","name":"https://git.kernel.org/stable/c/903227b6168bb99fd57d4e3c9c1b5014986198e0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/12917f591cea1af36087dba5b9ec888652f0b42a","name":"https://git.kernel.org/stable/c/12917f591cea1af36087dba5b9ec888652f0b42a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/61701912c58a05f6a043f097cc177a964abef348","name":"https://git.kernel.org/stable/c/61701912c58a05f6a043f097cc177a964abef348","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/83b22d7f7c384564fa42c3cf19bec715c693d7a2","name":"https://git.kernel.org/stable/c/83b22d7f7c384564fa42c3cf19bec715c693d7a2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b42cb640a0493d16b61ddd267420274be15efdc1","name":"https://git.kernel.org/stable/c/b42cb640a0493d16b61ddd267420274be15efdc1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/70c397b62ee015e19b3924d9da741c8dda017819","name":"https://git.kernel.org/stable/c/70c397b62ee015e19b3924d9da741c8dda017819","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64405","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64405","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6083089ab00631617f9eac678df3ab050a9d837a 903227b6168bb99fd57d4e3c9c1b5014986198e0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a13f316e90fdb1fb6df6582e845aa9b3270f3581 83b22d7f7c384564fa42c3cf19bec715c693d7a2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a13f316e90fdb1fb6df6582e845aa9b3270f3581 70c397b62ee015e19b3924d9da741c8dda017819 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a13f316e90fdb1fb6df6582e845aa9b3270f3581 61701912c58a05f6a043f097cc177a964abef348 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a13f316e90fdb1fb6df6582e845aa9b3270f3581 b42cb640a0493d16b61ddd267420274be15efdc1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a13f316e90fdb1fb6df6582e845aa9b3270f3581 12917f591cea1af36087dba5b9ec888652f0b42a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e4511a67fcdba9729d1c7cfc6d2e645c765ce801 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4ab81f16c68a602b2b69e333ae08d8748a9398de git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.83 6.1.118 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4.16 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5.3 6.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.118 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64405","cve":"CVE-2026-64405","epss":"0.001730000","percentile":"0.069700000","score_date":"2026-07-28","updated_at":"2026-07-29 00:05:33"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/bluetooth/hci_core.h","net/bluetooth/hci_conn.c","net/bluetooth/hci_sync.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"903227b6168bb99fd57d4e3c9c1b5014986198e0","status":"affected","version":"6083089ab00631617f9eac678df3ab050a9d837a","versionType":"git"},{"lessThan":"83b22d7f7c384564fa42c3cf19bec715c693d7a2","status":"affected","version":"a13f316e90fdb1fb6df6582e845aa9b3270f3581","versionType":"git"},{"lessThan":"70c397b62ee015e19b3924d9da741c8dda017819","status":"affected","version":"a13f316e90fdb1fb6df6582e845aa9b3270f3581","versionType":"git"},{"lessThan":"61701912c58a05f6a043f097cc177a964abef348","status":"affected","version":"a13f316e90fdb1fb6df6582e845aa9b3270f3581","versionType":"git"},{"lessThan":"b42cb640a0493d16b61ddd267420274be15efdc1","status":"affected","version":"a13f316e90fdb1fb6df6582e845aa9b3270f3581","versionType":"git"},{"lessThan":"12917f591cea1af36087dba5b9ec888652f0b42a","status":"affected","version":"a13f316e90fdb1fb6df6582e845aa9b3270f3581","versionType":"git"},{"status":"affected","version":"e4511a67fcdba9729d1c7cfc6d2e645c765ce801","versionType":"git"},{"status":"affected","version":"4ab81f16c68a602b2b69e333ae08d8748a9398de","versionType":"git"},{"lessThan":"6.1.118","status":"affected","version":"6.1.83","versionType":"semver"},{"lessThan":"6.5","status":"affected","version":"6.4.16","versionType":"semver"},{"lessThan":"6.6","status":"affected","version":"6.5.3","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/bluetooth/hci_core.h","net/bluetooth/hci_conn.c","net/bluetooth/hci_sync.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.6"},{"lessThan":"6.6","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.118","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.118","versionStartIncluding":"6.1.83","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc3","versionStartIncluding":"6.6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()\n\nhci_abort_conn() read hci_skb_event(hdev->sent_cmd) when a connection\nwas pending, but hdev->sent_cmd can be NULL while req_status is still\nHCI_REQ_PEND, leading to a NULL pointer dereference and a general\nprotection fault from the hci_rx_work() receive path.\n\nInstead of inspecting hdev->sent_cmd, track the in-flight create\nconnection command with a new per-connection HCI_CONN_CREATE flag and\nroute all cancellation through hci_cancel_connect_sync(), which\ndispatches to a dedicated per-type cancel function. The create command\nis in exactly one of two states: still queued, or in flight. The cancel\nfunction holds cmd_sync_work_lock across the whole decision: the worker\ntakes this lock to dequeue every entry, so while it is held a queued\ncommand cannot start running and an in-flight command cannot complete\nand let the next command become pending. This keeps the flag test and\nhci_cmd_sync_cancel() atomic with respect to the worker, so a queued\ncommand is simply dequeued, and an in-flight command owned by this\nconnection is cancelled without the risk of cancelling an unrelated\ncommand that became pending in the meantime. CIS uses the same flag\nmechanism via HCI_CONN_CREATE_CIS but cannot be dequeued per-connection.\n\nhci_acl_create_conn_sync() and hci_le_create_conn_sync() clear\nHCI_CONN_CREATE after the create command completes, but the command\nstatus handler can free conn via hci_conn_del() (for example when the\ncontroller rejects the connection) while the worker is still blocked on\nthe connection complete event. Hold a reference on conn across the\ncreate command so the flag can be cleared without a use-after-free."}],"providerMetadata":{"dateUpdated":"2026-07-25T08:50:47.262Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/903227b6168bb99fd57d4e3c9c1b5014986198e0"},{"url":"https://git.kernel.org/stable/c/83b22d7f7c384564fa42c3cf19bec715c693d7a2"},{"url":"https://git.kernel.org/stable/c/70c397b62ee015e19b3924d9da741c8dda017819"},{"url":"https://git.kernel.org/stable/c/61701912c58a05f6a043f097cc177a964abef348"},{"url":"https://git.kernel.org/stable/c/b42cb640a0493d16b61ddd267420274be15efdc1"},{"url":"https://git.kernel.org/stable/c/12917f591cea1af36087dba5b9ec888652f0b42a"}],"title":"Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64405","datePublished":"2026-07-25T08:50:47.262Z","dateReserved":"2026-07-19T15:36:31.786Z","dateUpdated":"2026-07-25T08:50:47.262Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:24","lastModifiedDate":"2026-07-25 10:17:24","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64405","Ordinal":"1","Title":"Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()","CVE":"CVE-2026-64405","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64405","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()\n\nhci_abort_conn() read hci_skb_event(hdev->sent_cmd) when a connection\nwas pending, but hdev->sent_cmd can be NULL while req_status is still\nHCI_REQ_PEND, leading to a NULL pointer dereference and a general\nprotection fault from the hci_rx_work() receive path.\n\nInstead of inspecting hdev->sent_cmd, track the in-flight create\nconnection command with a new per-connection HCI_CONN_CREATE flag and\nroute all cancellation through hci_cancel_connect_sync(), which\ndispatches to a dedicated per-type cancel function. The create command\nis in exactly one of two states: still queued, or in flight. The cancel\nfunction holds cmd_sync_work_lock across the whole decision: the worker\ntakes this lock to dequeue every entry, so while it is held a queued\ncommand cannot start running and an in-flight command cannot complete\nand let the next command become pending. This keeps the flag test and\nhci_cmd_sync_cancel() atomic with respect to the worker, so a queued\ncommand is simply dequeued, and an in-flight command owned by this\nconnection is cancelled without the risk of cancelling an unrelated\ncommand that became pending in the meantime. CIS uses the same flag\nmechanism via HCI_CONN_CREATE_CIS but cannot be dequeued per-connection.\n\nhci_acl_create_conn_sync() and hci_le_create_conn_sync() clear\nHCI_CONN_CREATE after the create command completes, but the command\nstatus handler can free conn via hci_conn_del() (for example when the\ncontroller rejects the connection) while the worker is still blocked on\nthe connection complete event. Hold a reference on conn across the\ncreate command so the flag can be cleared without a use-after-free.","Type":"Description","Title":"Bluetooth: hci_conn: Fix null ptr deref in hci_abort_conn()"}]}}}