Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

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Summary

CVECVE-2026-46056
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:25 UTC
Updated2026-06-01 17:17:21 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000160000 probability, percentile 0.039540000 (date 2026-06-01)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e b6ae482f88654db407c8c17619d4b62959b903ef git Not specified
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e 204028af77a265e31ceb4ba7f643349a3cca72b2 git Not specified
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 git Not specified
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e e08d75753db17aa943d7622f09d9c217b5bfd3b8 git Not specified
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e 8c6443bb9257b780986fb67ec08565bf48ecb8d7 git Not specified
CNA Linux Linux affected 92a25256f142d55e25f9959441cea6ddeabae57e 85fa3512048793076eef658f66489112dcc91993 git Not specified
CNA Linux Linux affected 3.7 Not specified
CNA Linux Linux unaffected 3.7 semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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