{"id":"CVE-2025-68287","summary":"usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths\n\nThis patch addresses a race condition caused by unsynchronized\nexecution of multiple call paths invoking `dwc3_remove_requests()`,\nleading to premature freeing of USB requests and subsequent crashes.\n\nThree distinct execution paths interact with `dwc3_remove_requests()`:\nPath 1:\nTriggered via `dwc3_gadget_reset_interrupt()` during USB reset\nhandling. The call stack includes:\n- `dwc3_ep0_reset_state()`\n- `dwc3_ep0_stall_and_restart()`\n- `dwc3_ep0_out_start()`\n- `dwc3_remove_requests()`\n- `dwc3_gadget_del_and_unmap_request()`\n\nPath 2:\nAlso initiated from `dwc3_gadget_reset_interrupt()`, but through\n`dwc3_stop_active_transfers()`. The call stack includes:\n- `dwc3_stop_active_transfers()`\n- `dwc3_remove_requests()`\n- `dwc3_gadget_del_and_unmap_request()`\n\nPath 3:\nOccurs independently during `adb root` execution, which triggers\nUSB function unbind and bind operations. The sequence includes:\n- `gserial_disconnect()`\n- `usb_ep_disable()`\n- `dwc3_gadget_ep_disable()`\n- `dwc3_remove_requests()` with `-ESHUTDOWN` status\n\nPath 3 operates asynchronously and lacks synchronization with Paths\n1 and 2. When Path 3 completes, it disables endpoints and frees 'out'\nrequests. If Paths 1 or 2 are still processing these requests,\naccessing freed memory leads to a crash due to use-after-free conditions.\n\nTo fix this added check for request completion and skip processing\nif already completed and added the request status for ep0 while queue.","modified":"2026-05-18T05:58:21.045115772Z","published":"2025-12-16T15:06:08.711Z","related":["ALSA-2026:0453","ALSA-2026:0793","SUSE-SU-2026:0278-1","SUSE-SU-2026:0281-1","SUSE-SU-2026:0293-1","SUSE-SU-2026:0315-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:20207-1","SUSE-SU-2026:20220-1","SUSE-SU-2026:20228-1","SUSE-SU-2026:20477-1","SUSE-SU-2026:20498-1","SUSE-SU-2026:20845-1","SUSE-SU-2026:20876-1","openSUSE-SU-2026:20145-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68287.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/467add9db13219101f14b6cc5477998b4aaa5fe2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/47de14d741cc4057046c9e2f33df1f7828254e6c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/67192e8cb7f941b5bba91e4bb290683576ce1607"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7cfb62888eba292fa35cd9ddbd28ce595f60e139"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afc0e34f161ce61ad351303c46eb57bd44b8b090"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e4037689a366743c4233966f0e74bc455820d316"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fa5eaf701e576880070b60922200557ae4aa54e1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68287.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-68287"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"72246da40f3719af3bfd104a2365b32537c27d83"},{"fixed":"467add9db13219101f14b6cc5477998b4aaa5fe2"},{"fixed":"67192e8cb7f941b5bba91e4bb290683576ce1607"},{"fixed":"47de14d741cc4057046c9e2f33df1f7828254e6c"},{"fixed":"afc0e34f161ce61ad351303c46eb57bd44b8b090"},{"fixed":"7cfb62888eba292fa35cd9ddbd28ce595f60e139"},{"fixed":"fa5eaf701e576880070b60922200557ae4aa54e1"},{"fixed":"e4037689a366743c4233966f0e74bc455820d316"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68287.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0"},{"fixed":"5.10.247"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.197"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.159"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.119"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.61"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.17.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68287.json"}}],"schema_version":"1.7.5"}