{"id":"CVE-2026-98632","title":"Bluetooth: mgmt: Dequeue pending mesh_send_sync entries on cancel","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: Dequeue pending mesh_send_sync entries on cancel\n\nIn send_cancel(), pending mesh_tx objects are removed from the\nhdev->mesh_pending list and freed via …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < f84e52829021d00bca8e067302f597c71af1f71a","Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 718a8ffa180d469f99ad4f746f00cafd39456415","Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 084be90948632a5a358821e687b11a14445aae76","Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 2189a219397d8e73808a67c4aade837b635705da","Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 03ced4687fb79286be7fdee0fc58d2c74de3e7bb","Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 71af682ba4692c2ed9ace4c3d4ca462ae368c029","Linux 6.1"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:19:56.287Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98632","references":[{"url":"https://git.kernel.org/stable/c/f84e52829021d00bca8e067302f597c71af1f71a"},{"url":"https://git.kernel.org/stable/c/718a8ffa180d469f99ad4f746f00cafd39456415"},{"url":"https://git.kernel.org/stable/c/084be90948632a5a358821e687b11a14445aae76"},{"url":"https://git.kernel.org/stable/c/2189a219397d8e73808a67c4aade837b635705da"},{"url":"https://git.kernel.org/stable/c/03ced4687fb79286be7fdee0fc58d2c74de3e7bb"},{"url":"https://git.kernel.org/stable/c/71af682ba4692c2ed9ace4c3d4ca462ae368c029"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.234Z","slug":"CVE-2026-98632","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: mgmt: Dequeue pending mesh_send_sync entries on cancel\n\nIn send_cancel(), pending mesh_tx objects are removed from the\nhdev->mesh_pending list and freed via mesh_send_complete().  However, if\na mesh transmission was already queued onto hdev->cmd_sync_work_list via\nmesh_next(), the queued entry retains a raw pointer to mesh_tx.\n\nWhen hci_cmd_sync_work later processes the entry, it attempts to execute\nmesh_send_sync and its destroy callback mesh_send_start_complete using\nthe already freed mesh_tx pointer, leading to a use-after-free.\n\nFix this by invoking hci_cmd_sync_dequeue() for mesh_send_sync on the\ntarget mesh_tx before completing it.  If the entry is found and dequeued,\nits destroy callback will complete and free the object; otherwise,\nmesh_send_complete() is called directly.\n\nAdditionally, ensure the transmission queue advances after cancellation\nor errors.  In mesh_send_start_complete(), call mesh_next() on error\nunless err is -ECANCELED, because hci_cmd_sync_dequeue() holds\nhdev->cmd_sync_work_lock and calling mesh_next() synchronously would\ndeadlock.  Instead, advance the queue in send_cancel() once the lock is\nreleased and if no transmission is in progress.\n\n## Affected\n\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < f84e52829021d00bca8e067302f597c71af1f71a`\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 718a8ffa180d469f99ad4f746f00cafd39456415`\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 084be90948632a5a358821e687b11a14445aae76`\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 2189a219397d8e73808a67c4aade837b635705da`\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 03ced4687fb79286be7fdee0fc58d2c74de3e7bb`\n- `Linux >= b338d91703fae6f6afd67f3f75caa3b8f36ddef3 < 71af682ba4692c2ed9ace4c3d4ca462ae368c029`\n- `Linux 6.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}