CVE-2026-68393

Published: Ago 10, 2026 Last Modified: Ago 10, 2026

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Other exploit source:

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In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_sync: extend conn_hash lookup critical sections

Using RCU-protected pointers outside the critical sections without
refcount is incorrect and may result to UAF.

Extend critical section to cover both hci_conn_hash lookup and use of
the returned conn.

Add surrounding rcu_read_lock() also when return value is not used, in
preparation for RCU lockdep requirement to hci_lookup_le_connect().

This avoids concurrent deletion of the conn before we are done
dereferencing it.

Also, make sure to hold hdev->lock when accessing hdev->accept_list.

https://git.kernel.org/stable/c/38326774df6198df0cc2744cc73bf77cb741c538

https://git.kernel.org/stable/c/83b7e67698d0b93f685875ce82c8d335436834f7

https://git.kernel.org/stable/c/d5efd6e4b8b0634af6843178fe1a7dd2b2178a3d