Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.8epss 0.3%
exploitation probability
0.3%top 82% of all CVEs
observed exploitation
nono source reports it
In 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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/01a6431766c35dfedb86e0cb5d3fc80c6d604a47https://git.kernel.org/stable/c/204028af77a265e31ceb4ba7f643349a3cca72b2https://git.kernel.org/stable/c/85fa3512048793076eef658f66489112dcc91993https://git.kernel.org/stable/c/8c6443bb9257b780986fb67ec08565bf48ecb8d7https://git.kernel.org/stable/c/b6ae482f88654db407c8c17619d4b62959b903efhttps://git.kernel.org/stable/c/d28311539ac9f65e29308ea219ecaa48aa5e76e5https://git.kernel.org/stable/c/e08d75753db17aa943d7622f09d9c217b5bfd3b8https://git.kernel.org/stable/c/ea18732d2614557e59f4c0d8cdbe6611aeab33b7