{"id":"CVE-2026-46056","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.7, < 6.1.175","linux_kernel >= 6.2, < 6.6.140","linux_kernel >= 6.7, < 6.12.86","linux_kernel >= 6.13, < 6.18.27","linux_kernel >= 6.19, < 7.0.4"],"patched":["linux_kernel 7.0.4"],"published":"2026-05-27","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:19:40.850","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46056","references":[{"url":"https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00262,"epssPercentile":0.16789,"ingestedAt":"2026-10-15T03:30:12.884Z","slug":"CVE-2026-46056","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: fix potential UAF in SSP passkey handlers\n\nhci_conn lookup and field access must be covered by hdev lock in\nhci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise\nthe connection can be freed concurrently.\n\nExtend the hci_dev_lock critical section to cover all conn usage in both\nhandlers.\n\nKeep the existing keypress notification behavior unchanged by routing\nthe early exits through a common unlock path.\n\n## Affected\n\n- `linux_kernel >= 3.7, < 6.1.175`\n- `linux_kernel >= 6.2, < 6.6.140`\n- `linux_kernel >= 6.7, < 6.12.86`\n- `linux_kernel >= 6.13, < 6.18.27`\n- `linux_kernel >= 6.19, < 7.0.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.4`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}