Linux Kernel Bluetooth Memory Leak via hci_le_big_terminate()
CVE-2026-53364 Published on July 13, 2026
Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate()
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate()
hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but
returns 0 without freeing it when neither pa_sync_term nor big_sync_term
flags are set after evaluating the PA and BIG sync connection state.
This early-return path was introduced when hci_le_big_terminate() was
refactored to take struct hci_conn instead of raw u8 parameters, adding
PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue
failure does not cover this path.
Products Associated with CVE-2026-53364
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Affected Versions
Linux:- Version a7bcffc673de219af2698fbb90627016233de67b and below e6b78019664dfe37c3dc707f50e7b453d6c7726d is affected.
- Version a7bcffc673de219af2698fbb90627016233de67b and below a59d4f4217e6200ca9180643e5738a87d3fa8be0 is affected.
- Version a7bcffc673de219af2698fbb90627016233de67b and below bfa9d28960ed677d556bdf097073bc3129686229 is affected.
- Version 087812a6119b4cd5c9d658b48aee40a25707a1c6 is affected.
- Version 6.16.4 and below 6.17 is affected.
- Version 6.17 is affected.
- Before 6.17 is unaffected.
- Version 6.18.35, <= 6.18.* is unaffected.
- Version 7.0.12, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.