{"id":"CVE-2024-58238","revision":"fbb09d9112db4321925e5262bd0894db","records":[{"revision":"fbb09d9112db4321925e5262bd0894db","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2024-58238","aliases":[],"title":"Bluetooth: btnxpuart: Resolve TX timeout error in power save stress test","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Resolve TX timeout error in power save stress test\n\nThis fixes the tx timeout issue seen while running a stress test on\nbtnxpuart for couple of hours, such that the interval between two HCI\ncommands coincide with the power save timeout value of 2 seconds.\n\nTest procedure using bash script:\n<load btnxpuart.ko>\nhciconfig hci0 up\n//Enable Power Save feature\nhcitool -i hci0 cmd 3f 23 02 00 00\nwhile (true)\ndo\n    hciconfig hci0 leadv\n    sleep 2\n    hciconfig hci0 noleadv\n    sleep 2\ndone\n\nError log, after adding few more debug prints:\nBluetooth: btnxpuart_queue_skb(): 01 0A 20 01 00\nBluetooth: hci0: Set UART break: on, status=0\nBluetooth: hci0: btnxpuart_tx_wakeup() tx_work scheduled\nBluetooth: hci0: btnxpuart_tx_work() dequeue: 01 0A 20 01 00\nCan't set advertise mode on hci0: Connection timed out (110)\nBluetooth: hci0: command 0x200a tx timeout\n\nWhen the power save mechanism turns on UART break, and btnxpuart_tx_work()\nis scheduled simultaneously, psdata->ps_state is read as PS_STATE_AWAKE,\nwhich prevents the psdata->work from being scheduled, which is responsible\nto turn OFF UART break.\n\nThis issue is fixed by adding a ps_lock mutex around UART break on/off as\nwell as around ps_state read/write.\nbtnxpuart_tx_wakeup() will now read updated ps_state value. If ps_state is\nPS_STATE_SLEEP, it will first schedule psdata->work, and then it will\nreschedule itself once UART break has been turned off and ps_state is\nPS_STATE_AWAKE.\n\nTested above script for 50,000 iterations and TX timeout error was not\nobserved anymore.","state":0,"publishedAt":"2025-08-09T14:31:47.079+00:00","modifiedAt":"2026-10-15T21:51:51.405+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/bluetooth/btnxpuart.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"689ca16e523278470c38832a3010645a78c544d8\",\n                            \"lessThan\": \"9d5df94ce0e213d5b549633f528f96114c736190\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"689ca16e523278470c38832a3010645a78c544d8\",\n                            \"lessThan\": \"e4db90e4eb8d5487098712ffb1048f3fa6d25e98\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/bluetooth/btnxpuart.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.4\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.49\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/9d5df94ce0e213d5b549633f528f96114c736190","https://git.kernel.org/stable/c/e4db90e4eb8d5487098712ffb1048f3fa6d25e98"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-58238","license":"CVE Program Terms of Use","key":"cve-program:CVE-2024-58238","identifiers":["CVE-2024-58238"]},"retained":false,"historicalAffected":[]}],"coverage":[]}