{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64405", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.786Z", "datePublished": "2026-07-25T08:50:47.262Z", "dateUpdated": "2026-08-17T04:55:03.466Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:55:03.466Z" }, "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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/bluetooth/hci_core.h", "net/bluetooth/hci_conn.c", "net/bluetooth/hci_sync.c" ], "versions": [ { "version": "6083089ab00631617f9eac678df3ab050a9d837a", "lessThan": "903227b6168bb99fd57d4e3c9c1b5014986198e0", "status": "affected", "versionType": "git" }, { "version": "a13f316e90fdb1fb6df6582e845aa9b3270f3581", "lessThan": "83b22d7f7c384564fa42c3cf19bec715c693d7a2", "status": "affected", "versionType": "git" }, { "version": "a13f316e90fdb1fb6df6582e845aa9b3270f3581", "lessThan": "70c397b62ee015e19b3924d9da741c8dda017819", "status": "affected", "versionType": "git" }, { "version": "a13f316e90fdb1fb6df6582e845aa9b3270f3581", "lessThan": "61701912c58a05f6a043f097cc177a964abef348", "status": "affected", "versionType": "git" }, { "version": "a13f316e90fdb1fb6df6582e845aa9b3270f3581", "lessThan": "b42cb640a0493d16b61ddd267420274be15efdc1", "status": "affected", "versionType": "git" }, { "version": "a13f316e90fdb1fb6df6582e845aa9b3270f3581", "lessThan": "12917f591cea1af36087dba5b9ec888652f0b42a", "status": "affected", "versionType": "git" }, { "version": "e4511a67fcdba9729d1c7cfc6d2e645c765ce801", "status": "affected", "versionType": "git" }, { "version": "4ab81f16c68a602b2b69e333ae08d8748a9398de", "status": "affected", "versionType": "git" }, { "version": "6.1.83", "lessThan": "6.1.118", "status": "affected", "versionType": "semver" }, { "version": "6.4.16", "lessThan": "6.5", "status": "affected", "versionType": "semver" }, { "version": "6.5.3", "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": [ "include/net/bluetooth/hci_core.h", "net/bluetooth/hci_conn.c", "net/bluetooth/hci_sync.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.118", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "6.1.83", "versionEndExcluding": "6.1.118" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2" }, { "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" } ] } ] } ], "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" } } } }